COOLED CYLINDRICAL LED LIGHTING DEVICE

Abstract

The object of the present invention relates to a cylindrical lighting device extending along a longitudinal axis X comprising: - light-emitting diodes (LEDs) arranged parallel or coinciding with the longitudinal axis X and oriented outwards from the lighting device, and - at least one internal conduit (7) with a regular cross-section, said internal conduit (7) extending along the longitudinal axis X and / or along an axis parallel to the longitudinal axis X, the internal conduit (7) providing cooling for said lighting device, as well as its use, in particular, for illuminating an outdoor environment or an industrial, agricultural, or maritime site, such as the deck of a ship. Abstract figure: Fig. 1

Description

Description Title of the invention: CY- LIGHTING DEVICE LED-COOLED INDICATOR The object of the present invention relates to a cylindrical lighting device, also called a cylindrical spotlight, comprising light-emitting diodes (LEDs) and an internal duct for cooling said lighting device. The object of the present invention also relates to the use of said lighting device for illuminating an outdoor environment or for illuminating an industrial, agricultural, or maritime site, such as the deck of a ship. The success of LED lighting devices can be explained by their many technical advantages, such as their low energy consumption, long lifespan, compactness and low weight, high level of safety, resistance to mechanical stresses (such as vibrations), the specific wavelengths of their lights, etc. Technical developments in LEDs have led to a search for increasing their power, that is, increasing the amount of light they provide. However, the main problem encountered in the industrial development of LED lighting devices is the elimination of the heat generated by them. Every light source generates heat (even minimal). However, when using LEDs, especially at high power, there is a risk of overheating during operation, which leads to a decrease in luminous efficacy, lifespan, and reliability. Several solutions have been described in the literature to maintain optimal operating temperatures for LEDs, particularly high-power LEDs, especially through heat dissipation. For example, RU2684461 describes an LED lamp with a hollow housing and open ends, on the outer surface of which a light-emitting diode module is connected to a power supply unit. In US201512443 is described a bulb comprising at least one cylindrical cooling body having at least one external support surface, where at least one LED source is disposed, and a control box installed in a hollow space of the cylindrical cooling body. RU2012147002 discloses a high-power LED lamp containing an emitter based on LED modules or strips, and LED cooling heat sinks. DE10201215652A 1 discloses a cylindrical LED lamp with a cooling element disposed inside a glass LED light holder in which the LEDs are arranged one after the other on a flat surface equipped with a heat sink. However, these solutions do not allow optimal cooling of the LEDs, especially when a wide lighting angle, requiring several high-power LEDs, is arranged in the lighting device. While such lighting devices can be useful for everyone, they are particularly sought after for outdoor environments, as well as in industrial, agricultural, and maritime sectors that require powerful lamps with wide beam angles. In particular, such lamps are of great interest in maritime settings, such as on the deck of a ship, where significant light sources are needed, even in conditions that can be challenging for light propagation (fog, sea spray, etc.). Indeed, while the current state of the art in LEDs offers some LEDs for marine use, the solutions offered are typically spotlights with very specific light orientations, of the same type as those found for domestic use (for example, garage entrance spotlights), poorly suited for the deck of a boat. The present invention seeks to solve these problems, in particular by providing powerful LED lamps with especially wide beam angles. Summary of the invention The object of the present invention relates to a cylindrical lighting device extending along a longitudinal axis X comprising: - light-emitting diodes (LEDs) arranged parallel to or coinciding with the longitudinal axis X and oriented outwards from the lighting device, and - at least one internal through-duct of regular cross-section, said internal duct extending along the longitudinal axis X and / or along an axis parallel to the longitudinal axis X, the internal duct enabling the cooling of said lighting device. The object of the present invention also relates to the use of a cylindrical lighting device extending along a longitudinal axis X comprising: - light-emitting diodes (LEDs) arranged parallel to or coinciding with the longitudinal axis X and oriented outwards from the lighting device, and - at least one internal through-duct with a regular cross-section, said internal duct extending along the longitudinal axis X and / or along an axis parallel to the longitudinal axis X, the internal duct allowing the cooling of said device lighting, to illuminate an outdoor environment or to illuminate an industrial, agricultural or maritime site, such as the deck of a ship. DEFINITIONS For the purposes of this invention, a "cylindrical lighting device" is understood to mean a lamp, that is, a support for one or more lighting points (i.e., LEDs in the context of this invention). The lamp according to this invention is predominantly composed of a cylinder, hence the term "cylindrical lighting device." In the context of this invention, a cylinder is a ruled surface whose generatrices are parallel, that is, a surface in space consisting of parallel lines. These parallel axes define the "longitudinal axis X," which is the axis passing through the center of gravity of the ruled surface of the cylinder and parallel to the generatrices. The cylindrical lighting device according to the invention may include surface irregularities, such as screw heads or valves.As such, the lighting device does not include the means, referred to as the external fixing means for the cylindrical lighting device, for fixing it to a support. Preferably, it is understood within the scope of the present invention that a cylinder is a tube, that is to say, a cylinder having a circular or oval cross-section. Light-emitting diodes, more commonly known as LEDs (from the English "light-emitting diode"), refer to an optoelectronic component that allows the emission of monochromatic light. For the purposes of this invention, "regular cross-section internal conduit" means a conduit passing through the cylindrical lighting device, preferably along the length of the longitudinal axis X. The cross-section of the conduit thus defined is homogeneous over its length, that is to say, the conduit generally takes the form of a cylinder. For the purposes of this invention, "industrial, agricultural or maritime site" means a geographical area of ​​activity dedicated to an industry, an agricultural activity or a maritime activity. BRIEF DESCRIPTION OF THE FIGURES The following are examples of embodiments of the present invention, by way of non-limiting illustration, with reference to the accompanying figures in which: [Fig. 1] is an external view of the cylindrical lighting device 1 according to the present invention, including in particular an external fixing means 2. The positioning of the longitudinal axis X, which passes completely through the device 1 and through the center of gravity of the two adjusted surfaces of the cylinder (here) can be seen in [Fig. 1]. circles) and parallel to the generators. [Fig. 2] shows a schematic diagram of the invention. The cylindrical lighting device 1 comprises a translucent outer wall 9 (for example, a PMMA tube), an internal conduit 7 (for example, an anodized aluminum tube), and two end caps 8 (which may be made, for example, of ASA) provided on one side with a decompression vent 6 for the internal chamber 5. Two zones can be identified on this internal conduit 7: a first hot zone 3 in contact with the LEDs and a second cold zone 4 opposite the LEDs. The temperature of these two zones is relative to each other (zone 4 being cooler than zone 3). Thus, in [Fig. 2], at least one cold air inlet A originates from outside the cylindrical lighting device 1. This air comes into contact with the hot zone 3, which heats the air and can result in a disturbed airflow C, which discharges hot air towards at least one outlet B. Depending on the arrangement of the cylindrical lighting device 1, the airflow can be laminar and pass from one end (inlet) of the internal duct 7 to a second end (outlet), and vice versa. Furthermore, a vent 6 can prevent overpressure phenomena in the internal chamber 5 by venting the pressurized air D from this internal chamber 5. [Fig. 3] is an external view of the device 1 according to the present invention without external fixing means. The cylindrical lighting device 1 comprises a translucent outer wall 9 (for example, a PMMA tube) and two end caps 8 (which may, for example, be made of ASA). As with [Fig. 1], [Fig. 2] shows the positioning of the longitudinal axis X, which passes completely through the device 1, passing through the center of gravity of the two regulated surfaces of the cylinder (here, circles) and parallel to the generatrices. [Fig.4] represents an internal conduit 7 (for example an anodized aluminium tube) attached to a nozzle 8 (which may be made of ASA). [Fig.5] represents an internal conduit 7 (for example an anodized aluminum tube) attached to an end cap 8 (which may be made of ASA) with a flexible LED circuit 10 affixed to the internal conduit 7 and an internal light reflector 11; attached to the end cap 8. [Fig.6] represents a tip 8 (which may be made of ASA) attached to an internal light reflector 11. [Fig.7] represents an external view of the tip 8 (which may be made of ASA) in place comprising an external fixing means 2, a hex head screw 12 allowing the external fixing means 2 to be fixed, possibly in a movable manner, to the tip 8 and a watertight connector 13. [Fig. 8] represents an insulated 8-piece tip (which may be made of ASA) comprising two holes Threaded holes 14 and 15. These holes may be identical or different in size and characteristics. Threaded hole 14 may correspond to the (threaded) inlet for a vent or watertight connector. Threaded hole 15 may correspond to the (threaded) inlet for a hexagonal head screw allowing attachment, possibly in a movable manner, with the external fastening means 2. [Fig.9] represents an external view of the tip 8 (which may be made of ASA) in place comprising an external fixing means 2, a hex head screw 12 and a vent 6. [Fig.10] represents an external view of the end piece 8 (which may be made of ASA) in place including an external fixing means 2, a hex head screw 12 and a threaded hole 14. The threaded hole 14 may correspond to the (threaded) inlet for vent or sealed connector. [Fig. 11] shows an internal view of the fitting 8 (which may be made of ASA) including a threaded hole 14, a fitting 16 for connection with the internal conduit 7 (for example, an anodized aluminum tube), and at least one O-ring 17 (preferably two for better sealing). The threaded hole 14 may correspond to the (threaded) inlet for a vent or a watertight connector. [Fig. 12] shows an enlarged internal cross-sectional view of the fitting 8 (which may be made of ASA) with at least one O-ring 17 (preferably two for better sealing) and a translucent outer wall 9 (for example, a PMMA tube). So : - Figures 1, 3, 7, and 9 illustrate external views of the cylindrical lighting device 1 as a whole or portions thereof (with the device assembled); - Figures 4, 5, 6, and possibly 10 are illustrations of the cylindrical lighting device 1 during assembly; and - Figures 8, 11, and 12 are illustrations of isolated elements of the cylindrical lighting device 1. DETAILED DESCRIPTION Cylindrical lighting device The object of the present invention therefore relates to a cylindrical lighting device 1 as described having as a technical effect a cooling of the LEDs not by means of fins, as is common in the art, but by means of an internal conduit 7 with a regular cross-section, the air circulating through the cylindrical lighting device 1 in contact with the internal faces of the conduit on which the LEDs are affixed on its external face. Any electrical source can be applied to the device according to the present invention. Preferably, the electrical source comes from a networked electrical circuit, for example a public electrical circuit. In an advantageous embodiment in terms of personal safety, the device according to the present invention is powered by low voltage (from 0 to 36 V). For example, the device according to the present invention is powered by 5 V, 12 V, 24 V or 36 V. In one embodiment, the device according to the present invention includes an electrical transformer, for example an AC-DC transformer enabling the generation of a 12V or 24V current to power the LEDs. In a particular embodiment, the device according to the present invention is energy self-sufficient or includes an energy-self-sufficient operating mode. Thus, the device according to the present invention may have a battery or an equivalent (a saline cell, lead-acid battery, lithium battery, polymer battery, etc.) and / or a means of generating electricity (such as a solar panel or a fuel cell). Preferably, LEDs are high power. In one embodiment, the multiplication of LEDs in the cylindrical lighting device 1 according to the present invention gives a large number of lumens per Watt (>1601m / W), by "fractionating" the heat dissipation over the entire length of the internal conduit 7. Preferably, the cylindrical lighting device 1 according to the present invention has a power greater than or equal to 120 lumens per Watt, for example 22W watts for 2640 lumens. Preferably, the cylindrical lighting device | according to the present invention has a power greater than or equal to 125 lumens per Watt, greater than or equal to 130 lumens per Watt, greater than or equal to 135 lumens per Watt, greater than or equal to 140 lumens per Watt, greater than or equal to 145 lumens per Watt, greater than or equal to 150 lumens per Watt, greater than or equal to 155 lumens per Watt or greater than or equal to 160 lumens per Watt. Preferably, the cylindrical lighting device 1 according to the present invention has a power greater than or equal to 10 Watts, greater than or equal to 12 Watts, greater than or equal to 14 Watts, greater than or equal to 16 Watts, greater than or equal to 18 Watts, greater than or equal to 20 Watts, greater than or equal to 22 Watts, greater than or equal to 24 Watts, greater than or equal to 26 Watts, greater than or equal to 28 Watts or greater than or equal to 30 Watts. In a particular embodiment, the cylindrical lighting device according to the present invention has a power greater than or equal to 35 Watts, greater than or equal to 40 Watts, greater than or equal to 45 Watts, greater than or equal to 50 Watts, greater than or equal to 55 Watts, greater than or equal to 60 Watts, greater than or equal to 65 Watts, greater than or equal to 70 Watts, greater than or equal to 75 Watts, greater than or equal to 80 Watts or greater than or equal to 85 Watts. Preferably, the cylindrical lighting device 1 according to the present invention has a power greater than or equal to 2000 lumens, greater than or equal to 2500 lumens, greater than or equal to 3000 lumens, greater than or equal to 3500 lumens, greater than or equal to 4000 lumens, greater than or equal to 4500 lumens, greater than or equal to 5000 lumens, greater than or equal to 5500 lumens, greater than or equal to 6000 lumens, greater than or equal to 7000 lumens or greater than or equal to 8000 lumens, preferably greater than or equal to 3500 lumens. Preferably, the cylindrical lighting device 1 according to the present invention has a power greater than or equal to 160 lumens per Watt, for example 22W watts for 4000 lumens. In one embodiment, the use of one or more high-power "mono-LEDs" in the cylindrical lighting device 1 according to the present invention gives a very large number of lumens but generally with a very large heat sink on the back of the LED, coupled in our case to a portion of the internal conduit 7. Preferably, the LEDs are arranged behind a translucent surface of the cylindrical lighting device 1, Preferably, the LEDs are oriented radially to the longitudinal axis X, that is, perpendicularly to the longitudinal axis X. In one embodiment, the cylindrical lighting device 1 can be a projector, i.e. a very high power lamp that can be focused on a restricted diffusion angle (less than 45°). In a preferred embodiment, the cylindrical lighting device 1 can be a spotlight, i.e. a very high power lamp having a wide diffusion angle (for example greater than 45°) or having a large wide diffusion angle (for example greater than 130°). For example, the light diffusion angle can be between 15° and 360° (implying the absence of an internal light reflector 11), preferably between 45° and 270°, more preferably between 90° and 210°, and even more preferably between 120° and 180°. It should be noted that the operation of the cooling duct differs depending on the angle of illumination. When the angle is less than approximately 270° (depending on the power applied), cold and hot zones appear which, thanks to the (disturbed) movement of internal air (or more generally fluid), generate natural circulation without the need to create additional movement (for example, mechanical ventilation with an electric motor). When the angle exceeds approximately 270° (depending on the power applied), the cooling duct no longer exhibits areas of significant temperature variation and behaves more like a heated chimney flue. Therefore, depending on the duct's (or lamp's) inclination relative to the horizontal, natural movements can also occur. Preferably, the cooling duct (i.e., the X axis or the lamp as a whole, as appropriate) is then placed with an angle of inclination greater than or equal to 15° from the horizontal, greater than or equal to 25° from the horizontal, greater than or equal to 35° from the horizontal, greater than or equal to 45° from the horizontal, greater than or equal to 55° from the horizontal, greater than or equal to 65° from the horizontal, greater than or equal to 75° from the horizontal, or greater than or equal to 85° from the horizontal, such as approximately 90°.For example, in one embodiment, the lamp is positioned so that the cooling duct (i.e., its walls) are at an angle of approximately 90° to the horizontal. Thus, preferably, the LEDs are arranged so as to illuminate a single angular portion of said device with an illumination angle less than or equal to 180° perpendicular to the longitudinal axis X. In one embodiment, the cylindrical lighting device 1 is equipped with LEDs arranged to allow the light diffusion angle to be varied. For example, the cylindrical lighting device 1 may be equipped with LEDs arranged to illuminate up to 360° (i.e., all around the cylindrical lighting device 1), and to allow the lighting to be restricted and thus adapted to the environment, both in terms of the diffusion angle and its intensity. In one embodiment, the cylindrical lighting device | according to the present invention can be characterized in that the LEDs are fixed on a flexible support, said flexible support advantageously being in direct contact with the internal conduit. Thus, in one embodiment the LEDs are not fixed on a flat printed circuit but arranged in a rounded shape on a flexible circuit, the diffusion of light is therefore ensured by the orientation of the LEDs and not by optics concentrating and directing the beam. The highly advantageous distribution of LEDs on a curved surface allows the diffusion angle to be increased without the need for a lens. In one embodiment, the cylindrical lighting device 1 includes a first zone at the level of the internal conduit 7 in contact with the LEDs, called the hot zone, and a second zone which is not in contact with the LEDs, called the cold zone, the hot zone and the cold zone being able to be separated by at least one partition. Advantageously, the cylindrical lighting device | comprises a circular, oval, polygonal or polygonal cross-section with at least one angle rounded. Advantageously, the internal conduit 7 comprises a cross-section of the same geometric shape as the cross-section of the device. More advantageously, the internal conduit 7 comprises a circular, oval, polygonal or polygonal cross-section with at least one rounded angle. In particular, the rounded corners provide a wall without roughness or obstruction to promote rapid and easy airflow, allowing for optimized cooling of the LEDs. In a particular embodiment, the cylindrical lighting device 1 comprises a circular, oval, polygonal or polygonal cross-section with at least one rounded angle and the internal conduit 7 comprises a cross-section of the same geometric shape as the cross-section of the device. Advantageously, the cylindrical lighting device 1 includes a circular or oval cross-section, thus making sealing easier. Advantageously, the internal conduit 7 includes a circular or oval cross-section, thus making sealing easier. In a particular embodiment, the cylindrical lighting device 1 comprises a circular or oval cross-section, and the internal conduit 7 comprises a cross-section of the same geometric shape as the cross-section of the device, thus making sealing easier. In a particular embodiment, the internal conduit 7 is coupled with a cooling fluid circuit. Preferably, however, the internal conduit 7 is connected to the outside of the device. The cooling fluid can then be ambient air or water. This external fluid can be forced into the internal conduit 7 to induce cooling. Preferably, the internal conduit 7 is in free communication with the exterior of the device. In the context of this invention, "free communication" means that there is no motor or other artificial means of moving the cooling fluid (e.g., air). Cooling is achieved through natural air convection. This embodiment has the advantage of greater simplicity in implementation than "forced" connections, thus avoiding breakdowns, reducing manufacturing complexity, decreasing the number of parts required, reducing electricity consumption, and thereby avoiding additional manufacturing costs. In order to provide thermal diffusion and sealing characteristics, the cylindrical lighting device 1 according to the present invention may include a conduit internal 7 with strong heat dissipation power, for example, internal duct 7 is made of aluminium or graphene. In one embodiment, the cylindrical lighting device 1 according to the present invention can be adapted for outdoor use. Preferably, the cylindrical lighting device 1 according to the present invention can be adapted for maritime transport, such as being positioned on the deck of a boat. Thus, more preferably, the cylindrical lighting device 1 according to the present invention can be a marine building lighting device, such as a ship's deck lighting device. Thus, advantageously, the cylindrical lighting device | according to the present invention can be sealed, in particular against water. Preferably, the cylindrical lighting device 1 according to the present invention can be made of non-corrosive materials. Thus, the cylindrical lighting device 1 according to the present invention has external surfaces made of one or more corrosion-resistant materials, preferably corrosion-resistant materials for outdoor use. In a particular embodiment, the cylindrical lighting device 1 according to the present invention includes a decompression vent. This vent prevents overpressures caused by (more or less sudden) temperature increases. In a particular embodiment, the cylindrical lighting device | according to the present invention comprises an external transparent and / or diffusing tube which may be made of polymethyl methacrylate or polycarbonate. In one embodiment, the cylindrical lighting device | according to the present invention comprises at least a second transparent and / or diffusing tube which may be made of polymethyl methacrylate or polycarbonate. In a particular embodiment, the cylindrical lighting device 1 according to the present invention includes an internal light reflector preferably disposed behind the LEDs. In a particular embodiment, the cylindrical lighting device 1 according to the present invention includes at least one external fixing means, such as a stainless steel fixing screw. In a particular embodiment, the cylindrical lighting device 1 according to the present invention can be characterized in that the sealing of said device is ensured by at least one O-ring. Thus, the O-ring placed between two parts constituting the cylindrical lighting device 1 according to the present invention ensures sealing. In a particular embodiment, the cylindrical lighting device 1 according to The present invention can be characterized in that the internal conduit is sealed at both ends by an O-ring ensuring the sealing of the device. In a particular embodiment, the cylindrical lighting device 1 according to the present invention comprises an external wall sealed at its two ends by at least one O-ring ensuring the sealing of the device. Thus, to supply electricity to the cylindrical lighting device 1 includes at least one waterproof connector 13. For example, the waterproof connector 13 can be a cable gland type power cable entry device or a waterproof plug connector. The waterproof connector can be placed at any location on the cylindrical lighting device 1 according to the invention. The waterproof connector is preferably placed on an end piece 8 of the cylindrical lighting device 1 according to the invention. Preferably, the waterproof connector is placed on a flat face of the tip 8 of the cylindrical lighting device 1 according to the invention. Uses The subject of this patent application also relates to the use of a cylindrical lighting device 1 to illuminate an outdoor environment or to illuminate an industrial, agricultural or maritime site, such as the deck of a ship. Examples Without limiting the scope of the present invention and by way of illustration, an LED lamp has been made according to the characteristics of the present invention (illustration [Fig.1]) and compared with a commercial realization of the prior art. Thus, a comparative test was carried out with a commercially available model, the "Genoese 50W 24V DC" used for fishing. The model according to the present invention is distinguished by a 13% lower power consumption compared to the tested model when the measurements are considered in relation to the light output. (Power consumption of the lamp according to the present invention at 24V = 0.98A, power consumption of the "Genoese" lamp at 24V = 2.22A, i.e., a factor of 2.26 (23.5A vs. 53.28A). A light output test at 10 meters was performed on both devices. The power levels are twofold (the 50W Genoa lamp illuminates twice as much as the lamp according to the present invention, but consumes 2.26 times more energy, or 13% more). The real difference lies in the beam angles and glare. At 45° to the beam axis in the horizontal plane (axis parallel to the projector), a brightness of 12 lux was observed at 0° and 12 lux at 45° (50% of the light output is obtained at 70°, or approximately 140° of angle on Alpha), whereas the 50W Genoa lamp provides 24 lux. at 0° but only 22° at 45°, highlighting its narrower angle of approximately 20° (50% of the light output is at 60° off-axis, therefore 120°). However, this difference increases even further when the projector is rotated vertically according to the present invention, due to the rounded arrangement of the LEDs. This results in a diffusion angle close to 160°, whereas the "Genoese" model remains at 120°. The test highlights a significant reduction in energy consumption, but above all, a much larger illuminated area thanks to the rounded arrangement of the LEDs. The lighting is far less dazzling and does not create shadows over a very large area.

Claims

Demands

1. Cylindrical lighting device (1) extending along a longitudinal axis gitudinal X including: - light-emitting diodes (LEDs) arranged in parallel or confused with the longitudinal axis X and oriented outwards from the lighting device (1), and - at least one internal conduit (7) passing through with a cross-section regular, said internal conduit (7) extending along the longitudinal axis X and / or along an axis parallel to the longitudinal axis X, the internal duct (7) allowing the cooling of said lighting device (1).

2. Cylindrical lighting device (1) according to claim 1 ca- characterized in that the LEDs are fixed to a flexible support, said support flexible being advantageously in direct contact with the internal conduit (mn.

3. Cylindrical lighting device (1) according to claim 1 or 2 ca- characterized in that the LEDs are arranged in such a way as to illuminate a only angular portion of said cylindrical lighting device (1) with a lighting angle of less than or equal to 180° perpendicular to the longitudinal axis X.

4. Cylindrical lighting device (1) according to any one of the claims previous indications characterized in that the internal duct (7) is in communication, preferably free, with the outside of said cylindrical lighting device (1).

5. Cylindrical lighting device (1) according to any one of the claims previous indications characterized in that the internal duct (7) is in aluminium or graphene.

6. Cylindrical lighting device (1) according to any one of the claims previous indications characterized in that the lighting device cycl- lindrique (1) comprises a circular, oval, po- cross-section polygonal or polygonal with at least one rounded corner and in that the internal conduit (7) includes a cross-section of the same shape geometric that the cross-section of the lighting device cy- lindrique (1).

7. Cylindrical lighting device (1) according to any one of the claims the preceding indications characterized in that said lighting device cylindrical (1) is sealed, especially against water.

8. Cylindrical lighting device (1) according to any one of the claims previous indications characterized in that the external surfaces of said cylindrical lighting device (1) are made of one or more materials corrosion resistant.

9. Cylindrical lighting device (1) according to any one of the claims the preceding indications characterized in that said lighting device cylindrical (1) has a power greater than or equal to 120 lumens per Watt. For example, 22W watts for 2640 lumens.

10. Use of a cylindrical lighting device (1) according to one any of the preceding claims to illuminate a medium outdoor use or for lighting an industrial, agricultural or maritime site, such as the deck of a ship.