Fixture for LED

Abstract

The present invention concerns a luminaire for an LED comprising two parts. These parts are a holder and a reflector, the holder being disc-shaped and comprising thermoplastic polyester, the thermoplastic polyester comprising 20 to 30 wt% glass-reinforced halogen-free polybutylene terephthalate. The holder has two ends, namely a proximal and a distal end. The holder is designed to be placed over the LED, with the distal end facing the LED. The holder serves to hold the LED in place within the luminaire and also to press the diode against a heat sink. The second part is a reflector which is truncated conical and comprising polytetrafluoroethylene. The truncated cone has a distal end with a minimum diameter and a proximal end with a maximum diameter.The reflector is suitable for placement over the holder, with the distal end, having the minimum diameter, positioned towards the holder and the LED. This allows the reflector to reflect the light from the LED. The diameter of the holder and the maximum diameter of the reflector are equal. Furthermore, both components feature a central opening suitable for placement around the LED. The holder features a central opening occupying 40% to 60% of the holder's volume; the reflector features a central opening occupying 10% to 20% of the reflector's mantle surface area. Both central openings are suitable for at least partially overlapping around the LED when the reflector is placed over the holder with the distal end facing the holder.

Description

2 Inefficient heat transfers reduced the performance of the entire system. These limitations emphasize the need for innovative solutions that ensure better thermal control, superior optical performance, and a robust mechanical construction. 5 US2012 / 293997 describes an LED module (light-emitting diode), consisting of a base and a cover. On the base are circuits and an LED array, which is coupled to the circuit, which in a specific design form can convert AC voltage to DC voltage. The LED module can be configured so that it occupies minimal space while still delivering the desired light output. This LED module10 does not succeed in solving the above-mentioned problems. The present invention aims to find a solution for at least some of the above-mentioned problems. 15 SUMMARY OF THE INVENTION The invention concerns a luminaire for an LED according to claim 1, comprising two parts. These parts are a holder and a reflector.Both of these comprise a recess of a specific size, which are shaped so that they can overlap around an LED. The holder presses the LED firmly against it, while the reflector sufficiently diffuses and reflects the emitted light. Further preferred shapes are described in claims 2 to 10. DESCRIPTION OF THE FIGURES Figure 1 shows an exploded view of a design of the present invention. Figures 2A and 2B show a top and side view of a design of a reflector. Figures 3A and 3B show a top and side view of a design of a holder. Figure 4 shows a cross-section of a design of the present invention. BE2024 / 5930 3 DETAILED DESCRIPTION The present invention concerns a luminaire for a light-emitting diode (LED) comprising two parts. These parts are a holder and a reflector, where the holder is disc-shaped and comprises thermoplastic polyester, where the thermoplastic 5 polyester 20 to 30 wt% glass fiber reinforced halogen-free polybutylene terephthalate.The holder has two ends, namely a proximal and a distal end. The holder is suitable for placement over the LED, with the distal end positioned towards the LED. The holder serves to hold the LED in place within the luminaire and also to press the diode against a heat sink.10 The second component is a reflector that is truncated cone-shaped and contains polytetrafluoroethylene. The truncated cone has a distal end with a minimum diameter and a proximal end with a maximum diameter. The reflector is suitable for placement over the holder, with the distal end, 15 with the minimum diameter, positioned towards the holder and the LED. This allows the reflector to reflect the light from the LED. The diameter of the holder and the maximum diameter of the reflector are equal. Furthermore, both parts comprise a central opening suitable for placement around the LED.20 The holder contains a central opening that occupies 40% to 60% of the volume of the holder; the reflector contains a central opening that occupies 10% to 20% of the mantel surface of the reflector.The two central openings are suitable to at least partially overlap around the LED when the reflector is placed over the holder with the distal end facing the holder.25 LED holders are part of modern lighting systems and play a role in many applications in both domestic and industrial environments. They provide support for LED modules and ensure that they are installed, protected, and cooled in the correct manner. LED lighting is being used increasingly30 because of the benefits in terms of energy efficiency, sustainability, and environmental impact. Well-designed LED holders play a key role in this, because they not only guarantee the lifespan and performance of the LEDs, but also contribute to the safety, reliability, and aesthetics of the lighting systems. 35 Various aspects come together in the design of an LED holder. Thermal management is important because LEDs are sensitive to overheating.A good holder ensures that the heat generated by the LED is effectively dissipated to a heat sink, thereby preventing damage to the module and loss of performance. In addition, the mechanical properties of the holder must be robust enough to hold the LED firmly in place, even in demanding conditions. The use of suitable materials, such as heat-conducting plastics or metals, is an important consideration in this regard. In addition to thermal and mechanical aspects, optical properties also play a role in the functionality of an LED holder. The design must minimize light loss and ensure that the light beam from the LED is optimally reflected or diffused, depending on the application. Materials that reflect or diffuse light are strategically employed to achieve the desired lighting effect, while simultaneously minimizing the impact of external factors such as UV radiation. The importance of LED holders in society extends beyond their technical function.They enable the large-scale implementation of energy-efficient LED lighting in a wide range of applications, from street lighting and office buildings to medical and industrial environments. With the growing demand for more sustainable technologies and stricter environmental standards, innovations in LED holders are essential to further improve the future of efficient and reliable lighting. By combining thermal, optical and mechanical design, LED holders contribute directly to the performance, lifespan and impact of LED lighting systems. In a mold, the container, the disc-shaped part of the invention, comprises thermoplastic polyester. The thermoplastic polyester comprises 10 to 70 wt%, preferably 20 to 50 wt%, even more preferably 20 to 40 wt%, most preferably 25 20 to 30 wt% glass fiber reinforced halide-free polybutylene terephthalate. Thermoplastic polyester is a group of polymers known for their excellent thermal and mechanical properties.They combine a high melting temperature with good chemical resistance and structural stability, making them ideal for applications in LED luminaires that deal with elevated temperatures and prolonged loading. Polybutylene terephthalate (PBT) is a specific type of thermoplastic polyester that is often used in engineering applications due to its high strength, stiffness, and thermal stability. The material is resistant to moisture, chemicals, and wear, which makes it suitable for use in environments where durability is essential. PBT is further reinforced by the addition of glass fibers, resulting in increased mechanical strength and improved dimensional stability. BE2024 / 5930 5 Glass fiber reinforcement makes the material more resistant to deformation at high temperatures, which is important to ensure that the holder can press the LED firmly against the heat sink without losing structural integrity.In addition, the polybutylene terephthalate in this design is halogen-free, which means that the material contains no halogen elements such as chlorine, bromine, or fluorine. This is important because halogens can release harmful gases upon combustion, which are dangerous to both health and the environment. The use of halogen-free materials contributes to the safety and durability of the invention, allowing it to better comply with modern environmental standards and regulations. The combination of thermoplastic polyester, glass fiber reinforcements, and a halogen-free composition makes the holder material not only suitable for the functional requirements of the invention but also offers advantages in terms of safety, environmental impact, and thermal management. This contributes to the overall robustness and reliability of the LED luminaire. In this design, the second component, the reflector, is a truncated cone. The truncated cone comprises a distal end with a minimum diameter.This end is suitable for placement over the LED, so that enclosing the LED allows for strategic positioning for optimal light reflection. Furthermore, the truncated cone contains a proximal end with a maximum diameter. By increasing the diameter from the distal to the proximal end, a geometric structure is created that not only reflects light efficiently but also distributes it in a targeted manner to meet specific lighting needs. The cone shape offers unique optical advantages because it enables controlled light distribution. The light emitted from the LED is reflected by the sloping walls of the reflector in a desired direction, depending on the angles and finish of the cone. This shape is particularly effective for applications where a wide light spread is required, such as in general lighting, or a more focused beam, such as in task lighting. The truncated geometry prevents Unwanted light scattering also minimizes light losses, which contributes to the overall efficiency of the LED luminaire.35 In this design, the reflector is manufactured from polytetrafluoroethylene (PTFE), a material known for its excellent reflective properties and thermal resistance. PTFE is highly resistant to high temperatures and has a very low coefficient of friction, which ensures a smooth surface that is ideal for light reflection. These properties make PTFE an excellent choice for a reflector in an LED luminaire, because it not only contributes to efficient light distribution but is also resistant to the heat generated by the LED.5 ​​Furthermore, the truncated cone shape is designed with a proximal end that has the same maximum diameter as the holder. This ensures a seamless connection between the holder and the reflector, which is not only aesthetically pleasing but also functional. This construction allows both components to work together efficiently to achieve optimal thermal and optical performance.The reflector is designed so that it can be placed over the holder, with the central openings of both parts partially overlapping around the LED. This design contributes to improved heat dissipation and uniform light distribution, which further improves the performance and durability of the LED luminaire.15 In one design form, the reflector is conical, with the central recess truncating the cone. This central recess is strategically designed to break the geometry of the cone and serves multiple functional and structural purposes. The truncating by the central recess ensures that the reflector can be positioned precisely around the LED, which is essential for effective light reflection and a controlled light beam. The cone shape offers a natural structure for directing and diffusing the LED light. However, due to the presence of the central recess, this cone shape is adapted to achieve an optimal balance between light reflection and space utilization.The cutout enables the reflector to make direct contact with the holder or the LED module, allowing for streamlined integration of the components. This minimizes losses in the optical path and ensures that the light from the LED is directly reflected and dispersed through the inner walls of the 30 cone. In a design form, the central cutout occupies 10% to 20% of the total cladding surface of the reflector, which is a parameter for guaranteeing both structural integrity and optical performance. This specification is not only important to ensure physical compatibility with the holder and the LED, but also to ensure an optimal light beam without distortions. Truncating the cone with the cutout helps to concentrate the light from the LED and guide it outwards efficiently BE2024 / 5930 7, while minimizing light loss due to internal reflections. Furthermore, the truncated geometry contributes to the thermal and mechanical properties of the reflector.It ensures that the cone retains its strength,5 despite the presence of a central opening, and at the same time offers space for ventilation or the integration of additional components such as mounting systems or optical lenses. The precision of the truncating and the size of the central recess play a crucial role in determining the reflector performance, both in terms of light distribution and heat management.10 In one design form, the height of the truncated cone is 5 to 10% of the diameter of the reflector. This proportional ratio between height and diameter has been carefully chosen to achieve an optimal balance between light reflection, structural stability, and compactness of the reflector. The relative height in relation to the diameter ensures that the reflector has a wide and flat profile, which contributes to a uniform light distribution without unnecessary light concentration or shadow effects.The low height makes the reflector suitable for applications where a compact construction is a requirement, for example in luminaires with a low profile height or in situations where space saving is an important design requirement. At the same time, the functionality of the reflector is ensured by the effective light guidance along the inner walls of the cone. The angle of inclination of the walls, in combination with the truncated structure, ensures that the light from the LED is reflected and dispersed in a controlled manner. Furthermore, the proportional height of 5 to 10% of the diameter offers the reflector a low center of gravity, which benefits the stability of the whole when it is placed over the holder. This design minimizes possible vibrations or movements that could affect the light quality. The chosen height-to-diameter ratio also helps to reduce material usage without compromising reflective performance, making the reflector lighter and more cost-efficient.Due to the 5 to 10% ratio, the truncated cone can optimally fulfill its optical function, while the luminaire as a whole becomes slimmer and more efficient. This not only contributes to an attractive design, but also makes the reflector suitable for various applications where both aesthetics and functionality are important BE2024 / 5930 8, such as in domestic, commercial, and industrial lighting systems. The precise matching of height to diameter illustrates the well-thought-out design of the invention, where form and function come together harmoniously. In one design, the reflector has an inclination between 5° and 10°, where the inclination is the ratio between the height of the truncated cone and the diameter of the base. This inclination ensures ideal light dispersion and reflection. In a design, the maximum diameter of the reflector and the diameter of the holder are equal. Preferably, this lies between 3 and 7 cm, more preferably between 3.5 and 5 cm.Due to these diameters, a compact and uniform structure is created, which is not only aesthetically appealing but also contributes functionally to the optical and thermal performance of the luminaire. In one design form, the housing and reflector are specifically designed to be compatible with a lens made of polymethyl methacrylate (PMMA), polycarbonate (PC), and / or glass. This versatility in material specifications makes it possible to adapt the LED luminaire to a wide range of applications and environments, depending on the requirements for optical performance, durability, and cost efficiency. PMMA is a transparent, lightweight material that offers optical properties such as high light transmission of more than 90%, which ensures efficient guidance of the LED light. Due to compatibility with a PMMA lens, the luminaire can be used in applications where brightness and cost-effectiveness are a priority, for example in domestic and decorative lighting.In addition, PMMA has good UV resistance, making parts suitable for indoor lighting without the risk of rapid aging due to light exposure. Compared to PMMA, polycarbonate offers higher impact resistance and thermal resistance, making it ideal for applications where robustness and safety are important. Thanks to compatibility with a PC lens, the luminaire can be used in environments where there is a risk of mechanical impact, such as in industrial or outdoor lighting. Furthermore, the thermal stability of PC makes it possible to integrate parts into luminaires exposed to higher temperatures without compromising the structural integrity or optical performance of the parts. BE2024 / 5930 9 For applications where maximum durability and optical clarity are required, such as in medical or commercial lighting systems, compatibility with a glass lens is of great importance. Glass offers superior scratch and chemical resistance and retains its optical properties even under harsh conditions.By making the reflector holder suitable for use with a glass lens, the luminaire can be deployed in demanding applications where precision and longevity are essential. The reflector is designed so that it not only effectively reflects the light from the LED, but also completely covers the screws, the LED base, solder contacts, and any cables. This complete covering prevents the light from the LED from reflecting off other materials inside the luminaire. This minimizes light losses and ensures that the light is guided exclusively through the reflector before exiting through parts. Furthermore, the reflector holder protects other internal components from exposure to ultraviolet (UV) radiation in the LED light. This is an important advantage, as UV radiation could age the holder, which could potentially affect the holder's primary function of pressing the LED firmly against the heat sink.By preventing this aging, the reflector20 indirectly contributes to the preservation of the thermal and mechanical performance of the luminaire and to the lifespan of the LED. This design emphasizes the role of the reflector as an essential element in optimizing both the optical and structural properties of the LED luminaire. 25 In this design, the LED has an average beam angle of 120°, which means that the light covers a wide angle. To utilize as much light as possible effectively and minimize reflection losses, the holder-reflector combination is designed to be as low as possible. This compact configuration ensures that the light is optimally guided by the reflector and accurately directed to parts, which maximizes the efficiencies and performance of the luminaire. The reflector can be securely attached to the holder in several ways. In addition to using clamping tension between the parts and the holder, the reflector can also be fixed with glue, a bayonet lock, or other mechanical connection techniques.35 This versatility in mounting options makes it possible to reliably mount the reflector, regardless of the specific application or design requirements of the luminaire. This guarantees a stable and durable integration of the components, which contributes to the efficiency and lifespan of the LED luminaire. In a specific design, the holder has a melting temperature between 150 and 500°C, preferably between 200 and 400°C, most preferably between 200 and 300°C,5 measured according to ISO 11357-1 / -3. This specific temperature range is suitable for ensuring the functional integrity of the holder, even under the demanding thermal conditions typical of LED luminaires. The melting temperature reflects the thermal stability of the material used, which is important to prevent the holder from deforming or structurally failing during prolonged exposure10 to heat, for example from heat generated by the LED. The material used, thermoplastic polyester reinforced with 20 to 30 wt% glass fiber, contributes to achieving this melting temperature.Glass fiber reinforcement not only increases the mechanical strength and dimensional stability15 of the material, but also prevents the material from losing its properties at temperatures at the higher end of the melting range. This makes the holder not only suitable for securing the LEDs and transferring thermal energy to the heat sink, but also guarantees that the material can withstand thermal cycling without degradation or loss of performance.20 The melting temperature, as determined according to ISO 11357-1 / -3, is measured using differential scanning calorimetry (DSC). This method offers an accurate and reproducible way to evaluate the thermal behavior of polymers. By choosing a material that meets this temperature range and the relevant measurement standards, it is ensured that the holder meets the requirements for both technical performance and conformity with international standards. This melting temperature is further important for production processes such as injection molding, where the material is formed in a molten state.A well-defined melting range not only facilitates processing but also reduces the risk of defects in the final product, such as internal stresses or uneven structure formation. With a melting temperature in the range of 200 to 300°C, the holder therefore offers both thermal robustness and ease of processing, which is essential for the reliability and durability of the LED luminaire. In a further design form, the holder has an elastic modulus between 8000 and 10000 MPa, measured according to the standard ISO 527-1 / -2. This value reflects the stiffness of the material and indicates how well the holder resists deformation under load. An elastic modulus within this range ensures that the holder is strong enough to hold the LED firmly in place and against to compress the cooling element, while the material retains sufficient flexibility to absorb stresses and prevent cracks or fractures in the event of mechanical impact5 or thermal expansion.Partial modulus of elasticity is influenced by the composition of the material, in this case thermoplastic polyester with 20 to 30 wt% glass fiber reinforcement. The glass fiber reinforcement contributes significantly to the high stiffness of the material, without compromising other properties such as thermal resistance and dimensional stability. This makes the material ideal for the holder, which not only functions as mechanical support but also plays a key role in the thermal and optical performance of the LED luminaire. 15 The value of the modulus of elasticity, as determined according to ISO 527-1 / -2, is measured via tensile tests, in which the material is subjected to a controlled tensile load. This standard test offers an accurate and reproducible way to evaluate the mechanical properties of polymers. The range of 8000 to 10000 MP indicates that the container is not only suitable for static loads, but is also resistant to dynamic loads or vibrations, which is essential for applications in, for example, industrial or outdoor environments.A high modulus of elasticity further contributes to the dimensional stability of the holder, even under prolonged exposure to heat or mechanical pressure. This means that the holder does not deform or deviate from its original shape, which is crucial for the positioning of the LEDs and contact with the cooling element. Moreover, the stiffness ensures that the luminaire retains its mechanical integrity during installation and use, which benefits the durability and reliability of the entire lighting system. Combining a modulus of elasticity within this specific range with other high-performance properties, such as a melting temperature of 200 to 300°C and fiberglass reinforcement, makes the holder an extremely robust and versatile component of the LED luminaire. This combination of properties guarantees optimal performance, even in demanding applications where mechanical and thermal loads overlap.The choice of a material with such stiffness BE2024 / 5930 12 underscores the innovative character and technical precision of this invention. In a design, the holder has a relative temperature index (RTI) between 50 and 300°C, preferably between 100°C and 250°C, even more preferably between 100°C and 200°C, and most preferably between 120 and 150°C, measured according to UL765B. This RTI value indicates the temperature to which the holder material can be exposed for extended periods without significant deterioration of its mechanical, electrical, or thermal properties. The use of a material with an RTI in this range is suitable for ensuring the reliability and performance of the LED-10 luminaire, especially in applications where the holder is exposed to constant or repeated thermal loading. The relative temperature index is determined by means of standardized tests according to UL746B, a standard that investigates the thermal aging properties of 15 polymers.During these tests, the material is exposed to elevated temperatures for an extended period, and the limit is determined at which the material still retains at least 50% of its original properties. For a holder that forms part of an LED luminaire, this is particularly relevant because the LED itself generates heat which, over extended periods, can affect the mechanical strength and dimensional stability of the holder. With an RTI value between 120 and 150°C, the holder is suitable for LED luminaires used in environments where temperatures regularly rise, such as in industrial installations, commercial lighting, or domestic applications with limited ventilation. This RTI value ensures that the holder retains its structure, shows no thermal degradation, and continues to function effectively, even during prolonged exposure to heat. The material used, a thermoplastic polyester reinforced with 20 to 30 wt. 30 glass fibers, contributes to this higher RTI value.Glass fiber reinforcement not only increases the thermal resistance of the material but also prevents the material from deforming or breaking at elevated temperatures. Moreover, the material remains stable during repeated thermal cycles, which is essential for applications where the temperature fluctuates, such as when switching the LED on and off.35 In a further design form, the holder comprises at least one, preferably two radial recesses, suitable for attaching the holder to the luminaire with BE2024 / 5930 13 at least one, preferably two screws. These recesses are strategically placed in the holder and have multiple functions. They not only provide mechanical support for attaching the holder to the rest of the luminaire but also contribute to the structural integrity and stability of the entire LED system. The radial recesses are designed to securely position and lock the screws, so that the holder can be firmly and precisely attached to the fixture.These recesses are sufficiently deep and wide to accommodate a standard screw head, and they can also feature a tapered design to firmly clamp the screw head, which contributes to the durability of the connection. By using at least two recesses, a symmetrical attachment is achieved, which minimizes the risk of shifting or wobbling of the holder during assembly or use. Preferably, the radial recesses are positioned at equal distances from the center of the holder, along a circular pattern that follows the structure of the holder15. This placement ensures a balanced distribution of the mechanical forces exerted by the screws, thereby preventing deformation of the holder and making the fastening resistant to vibrations or other external loads. For applications where extra stability is required, the recesses can also be combined with metal inserts or reinforcement rings, making the connection even more robust.The material of the holder, glass fiber-reinforced thermoplastic polyester, plays a key role in supporting these design features. The high modulus of elasticity of the material ensures that the recesses retain their shape and withstand the forces exerted by the screws, even after prolonged use. Furthermore, the material offers sufficient flexibility to allow assembly without the risk of breakage or cracking. The addition of at least one, preferably two radial cutouts in the holder30 makes the design versatile and more practical for mounting. It facilitates the assembly of the LED luminaire, reduces installation times and contributes to a safe and reliable installation. This feature makes the holder not only functional, but also suitable for large-scale production and application in a wide range of lighting environments, from domestic to industrial systems. This innovative mounting system further enhances the robustness and user-friendliness of the invention.BE2024 / 5930 14 In a specific design, the reflector has a melting temperature between 170 and 300°C, measured according to the standard ISO 11357-1 / -3. This specific temperature range is suitable for the performance and durability of the reflector, especially in applications where the reflector is exposed for extended periods to the heat generated by the LED. The melting temperature indicates the point to which the material retains its structural integrity and is resistant to thermal degradation. The material chosen for the reflector, polytetrafluoroethylene (PTFE), contributes to this high thermal resistance. PTFE is known for its excellent thermal stability, with properties that ensure it retains its shape and functionality at temperatures within the range of 170 to 300°C. This makes the material suitable for the reflector, as it is resistant not only to heat but also to temperature fluctuations, which is essential in situations where LEDs are frequently switched on and off. The melting temperature is further important for the optical performance of the reflector.A stable thermal structure prevents changes in the reflective surfaces, ensuring that the reflector remains consistent in directing and scattering light, even during prolonged use. This contributes to the overall efficiency of the LED luminaire, as light loss due to thermal deformation or degradation of the reflective surface is minimized. In a specific design, the reflector has an elastic modulus between 1000 and 3000 MPa, measured according to the ISO 527-1 / -2 standard. This elastic modulus value indicates that the reflector material offers a balance between flexibility and stiffness. This is important for ensuring both the mechanical stability and the optical performance of the reflector within the LED luminaire. A modulus of elasticity within this range means that the reflector has sufficient stiffness30 to retain its shape and withstand mechanical stresses that may occur during assembly or use.This prevents distortions that could affect the optical properties, such as light reflection and direction control. At the same time, the modulus of elasticity offers sufficient flexibility to absorb minor adjustments and vibrations, thereby reducing the risk of fractures or cracks35, even under dynamic load. BE2024 / 5930 15 In a further design, the reflector has a diffuse reflectivity between 90 and 100%, measured according to the standard ISO 13468-2. This property is essential for the effective dispersion of the light emitted by the LED, thereby achieving uniform and efficient illumination. Diffuse reflectivity refers to the ability of a surface to reflect incident light in multiple directions, rather than concentrating the light in one specific direction as with specular reflection. This is of particular importance in applications where uniform illumination is desired, such as general interior lighting or architectural applications.10 A reflectivity of 90 to 100% means that the reflector material reflects virtually all incident light, which minimizes light loss and maximizes the efficiency of the LED luminaire. This high degree of reflectivity is possible thanks to the use of polytetrafluoroethylene (PTFE), a material known for its exceptional reflective properties and whiteness. PTFE has a microscopically structured surface that ensures optimal diffuse reflection, causing the LED light beam to be evenly distributed and glare to be reduced. The measurement of diffuse reflectivity according to ISO 13468-2 involves the use of an integrating sphere to determine how much light is reflected by the surface. This provides an accurate and reproducible assessment of the reflective properties of the reflector.A reflectivity of 90 to 100% according to this standard means that the reflector is particularly suitable for applications where maximum light output and uniform light distribution are required, such as in commercial lighting, theaters, or medical environments and where shadow formation is undesirable.25 In addition to improving light output, the high diffuse reflectivity also contributes to an aesthetically pleasing lighting effect. By distributing the light in a controlled manner, the reflector provides soft, non-glare lighting that is comfortable for users and suitable for various environments. This property30 makes the reflector particularly valuable in applications where visual comfort and functional lighting go hand in hand, such as in offices, shops, and public spaces. In what follows, the invention is described by means of non-limiting examples that illustrate the invention, and which are not intended or should not be interpreted to35 limit the scope of the invention.FIGURES BE2024 / 5930 16 Figure 1 shows an exploded view of a design of an LED luminaire consisting of multiple parts. The top element (1) is the LED, which forms the light source of the luminaire. Below the LED is the holder (2), which is disc-shaped and contains a central opening (5). The holder is suitable for holding the LED in place and pressing it firmly against a cooling element. Below that is the reflector (3), which is truncated cone-shaped and also contains a central opening (6). The reflector is placed over the holder and is designed to reflect and disperse the light from the LED. The holder and the reflector are attached to each other using two screws (4). The screws are placed in the recesses (7) provided for this purpose in the holder and ensure a firm and durable attachment of the parts. The central openings (5,6) of The holder and reflector respectively overlap around the LED, so that a streamlined and functional design is realized that enables optimal light reflection and thermal management.15 The housing is manufactured from glass fiber reinforced thermoplastic polyester with 25 wt% halogen-free polybutylene terephthalate (PBT). This material offers an excellent combination of thermal resistance, with a melting temperature of 250°C, and mechanical strength, with an elastic modulus of 8300 MPa. The reflector is made of polytetrafluoroethylene (PTFE), a material known for its high thermal stability, with a melting temperature of 190°C, and excellent optical properties, including a diffuse reflectivity of 97%. These properties make the reflector suitable for efficiently reflecting and scattering light, while it is resistant to the heat generated by the LED. Together, these materials contribute to a robust, durable and functional LED luminaire. Figure 2A and 2B show a design of a reflector. The figure shows a side view (fig. 2A) and top view (fig. 2B) of the reflector (3). The reflector has a truncated cone shape, where the proximal end (10) has the maximum diameter and the distal end (11) has the minimum diameter.This geometry is designed to effectively reflect and disperse the light from the LED. In the top view, the central opening (6) of the reflector is visible. This opening, which is located in the center of the reflector and truncates the cone, overlaps with the central opening of the holder when the reflector is mounted in the luminaire. The opening is essential for positioning the LED and contributes to a streamlined light path. The central opening occupies 17% of the mantel surface of the truncated cone. Figure 3A and 3B show a design of a holder. The figure shows a side view (fig. 3A) and a top view (fig. 3B) of the holder (2). The holder is a disc-shaped part of the luminaire. The side view shows the proximal end (8) and the distal end (9) of the holder. The distal end (9) is designed to make direct contact with the LED and press it firmly against the cooling element. The proximal end (8) provides a connection point for the reflector, allowing for seamless integration between the parts.10 The top view shows the central opening of the holder(5), which is an important structural element. This opening is suitable for positioning the LED and overlaps with the central opening of the reflector when the components are mounted. In addition, the holder includes two radial recesses(7),15 strategically placed along the edge of the holder. These recesses are designed to accommodate mounting screws and ensure a firm and stable mounting of the holder in the luminaire.