Lamp with rotatable light emitting element

Abstract

The utility model relates to a lamp with a rotatable light emitting element. A lamp having a plurality of elongate lighting elements. Each elongated lighting element includes an outer tube, an inner tube located within the outer tube, and an elongated light source retained within the inner tube. The inner tube and the elongated light source are rotatable together within the outer tube. A rotation mechanism is used to facilitate or control rotation of the inner tube and the elongate light source. The elongate lighting element is held between and secured to the two support portions.

Description

TECHNICAL FIELD

[0001] The present utility model relates to the field of artificial lighting, in particular to a tube lamp. BACKGROUND

[0002] There is a constant desire to improve artificial lighting devices, which are used to provide artificial light in a wide variety of environments, such as in the home, industry and / or public spaces.

[0003] Artificial lighting devices typically comprise one or more lamps (e.g. light bulbs) for emitting light. One known type of lamp is a tubular lamp or tube lamp, which comprises one or more tubes containing light emitting elements. A recent development in tubular lamps is the LED tube lamp, which comprises a tube enclosing an elongate light source comprising a linear array of LEDs.

[0004] It is desirable to provide a lamp with improved flexibility of use. SUMMARY

[0005] According to an example in accordance with an aspect of the present utility model, there is provided a lamp comprising two or more elongate lighting elements, each elongate lighting element comprising: an elongate light source configured to emit light from a light emitting surface; a first tube covering the elongate light source, wherein the first tube is fixedly secured to the elongate light source and comprises a light exit window formed from a first light transmissive material covering the light emitting surface; a second tube comprising a second light transmissive material, which fully covers the first tube, wherein the first tube is positioned within the second tube and the first tube is rotatably coupled to the second tube; and a rotation mechanism configured to facilitate rotation of the elongate light source and the first tube within the second tube; wherein each elongate lighting element extends from a first end to a second end.

[0006] The lamp further comprises: a first support portion configured to support the first end of each elongate lighting element; and a second support portion configured to support the second end of each elongate lighting element; the second tube of each elongate lighting element is fixedly secured to both the first support portion and the second support portion.

[0007] The present disclosure provides a lamp having a plurality of elongate lighting elements. Each elongate lighting element is secured between first and second support portions. Each elongate lighting element comprises an outer tube (second tube) and a rotatable inner tube (first tube). In particular, in each elongate lighting element, the inner tube is rotatable within the outer tube, for example, about an axis along which the elongate lighting element extends. The inner tube houses or contains an elongate light source, which rotates with the rotation of the inner tube. Thus, rotation of the inner tube (and hence the elongate light source) controls or changes the direction(s) in which the elongate light source outputs light. For any rotational position of the elongate light source, the inner tube and outer tube allow light emitted from the elongate light source to exit from the lamp.

[0008] The proposed lamp thus provides a robust lamp in which the direction of light emitted by the different lighting elements is (individually) controllable. In particular, the construction of the double tube provides good structural support for the elongated light sources by using the inner tube and reduces the risk of the elongated lighting elements twisting (e.g. changing the direction of the axis along which the elongated lighting elements extend) due to rotation of the elongated light sources.

[0009] In some examples, the first support portion comprises electronic circuitry for powering the elongated light sources. The elongated light sources can be electrically connected only through the electronic circuitry. Thus, each elongated light source can be electrically connected through a single end of the elongated lighting element. This provides a single location for providing electrical connections, thereby improving the ease of installation of the lamp and / or maintenance of the electronic circuitry.

[0010] The second tube of each elongated lighting element can be securely fixed to the first and second support portions with adhesive. This provides a robust and easy to manufacture mechanism for fixing the first and second support portions to the second tube.

[0011] In some examples, each elongated lighting element extends parallel to each other.

[0012] For each elongated lighting element, the rotation mechanism can comprise a knob for facilitating manual rotation of the elongated light source and the first tube. This provides a simple and intuitive mechanism for facilitating user or operator manipulation of the direction of light emitted by each elongated light source by facilitating manual control of the rotation of each elongated light source, and thus the direction of light output by each elongated light source and corresponding elongated lighting element.

[0013] In some examples, the first and second support portions maintain the position of the second tube of each elongated lighting element relative to each other. This helps to prevent or reduce the risk of each elongated lighting element twisting and / or bending when the elongated lighting elements and the first tubes of the elongated lighting elements are rotated.

[0014] The second support portion can comprise spacers for maintaining the position of the second ends of the elongated lighting elements relative to each other.

[0015] In each elongated lighting element, the rotation mechanism can cover the boundary between the inner surface of the first tube and the end face of the first tube. This reduces the likelihood of the first tube moving towards the rotation mechanism when being rotated by the rotation mechanism, for example, which can otherwise be caused by a screwing effect.

[0016] In some examples, in each elongate lighting element, the first tube comprises one or more protrusions located inside the first tube; and in preferred examples, the rotation mechanism engages with the one or more protrusions to control rotation of at least the first tube. This provides a secure connection between the rotation mechanism and the first tube.

[0017] In some examples, for each elongate lighting element, each protrusion extends from an inner wall of the first tube towards the elongate light source.

[0018] In examples, for each elongate lighting element, the rotation mechanism facilitates rotation of the first tube independently of rotation of the first tube of any other elongate lighting element.

[0019] In examples, for each elongate lighting element, the first tube is placed concentrically with the second tube.

[0020] In each elongate lighting element, the rotation mechanism can be configured to facilitate rotation of the elongate light source and the first tube about an axis extending through the elongate lighting element.

[0021] For each elongate lighting element, the rotation mechanism can be configured to facilitate rotation of the elongate light source and the first tube about the axis of no more than 360°. This is particularly advantageous if the electrical connection to the elongate light source(s) comprises one or more electrical wires, as it reduces the risk of any electrical wires becoming twisted or taut upon rotation beyond an acceptable number of degrees.

[0022] These and other aspects of the present invention will become apparent from the embodiments described below and elucidated from the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] For a better understanding of the present invention, and to show how it can be put into effect, reference will now be made, purely by way of example, to the accompanying drawings in which:

[0024] Figure 1 A partial view of the proposed lamp is provided;

[0025] Figure 2 An enlarged view of a portion of the proposed lamp is provided;

[0026] Figure 3 A top view of the proposed lamp is provided;

[0027] Figure 4 A perspective view of the proposed lamp is provided;

[0028] Figure 5 A first exploded view of the proposed lamp is provided; and

[0029] Figure 6 A second exploded view of the proposed lamp is provided. DETAILED DESCRIPTION

[0030] The present application will be described with reference to the accompanying drawings.

[0031] It should be understood that, although detailed descriptions and specific examples are set forth below, these descriptions and examples are merely for purposes of illustrating exemplary embodiments of the devices, systems, and methods, and are not intended to limit the scope of the present application. These and other features, aspects, and advantages of the devices, systems, and methods of the present application will become better understood from the following description, appended claims, and accompanying drawings. It should be understood that the drawings are merely schematic and are not drawn to scale. It should also be understood that the same reference numerals are used throughout the figures and that these reference numerals are intended to represent the same or similar components, aspects, features, elements, and / or steps.

[0032] The present application provides a lamp having a plurality of elongate lighting elements. Each elongate lighting element comprises an outer tube, an inner tube located within the outer tube, and an elongate light source held within the inner tube. The inner tube and the elongate light source are rotatable together within the outer tube. A rotation mechanism is used to facilitate or control rotation of the inner tube and the elongate light source. The elongate lighting element is held between and secured to two support portions.

[0033] Figure 1 The proposed lamp 100 is shown. For clarity and understanding of the features of the proposed lamp, Figure 1 Only a portion of the lamp is shown.

[0034] The lamp 100 comprises two or more elongate lighting elements 101, 102, a first support portion 150, and a second support portion 160.

[0035] In the illustrated example, the lamp 100 comprises only two elongate lighting elements. However, the skilled person will understand that the lamp can comprise any number of two or more lighting elements, for example, 2 elongate lighting elements, 3 elongate lighting elements, 4 elongate lighting elements, or more.

[0036] Each elongate lighting element 101 extends from a first end 101A to a second end 101B. In particular, each elongate lighting element extends from the first end 101A to the second end 101B along a respective axis X. The first support portion 150 is configured to support the first end 101A of each elongate lighting element 101. The second support portion 160 is configured to support the second end 101B of each elongate lighting element 101. Thus, each elongate lighting element is supported between the first support portion 150 and the second support portion 160.

[0037] The elongate lighting elements 101 of the proposed lamp 100 and optional features thereof will be described below. It should be understood that each elongate lighting element 101, 102 can embody any of the elongate lighting elements described below.

[0038] Accordingly, when a certain element is disclosed as being part of a given elongated lighting element, it is understood that each elongated lighting element can comprise a different instance of said element. Thus, any reference to any specific element of any (single) elongated lighting element is to be interpreted as a reference to the corresponding instance of said element in each elongated lighting element.

[0039] The elongated lighting element 101 comprises an elongated light source 110, a first tube 120, a second tube 130, and a rotation mechanism 140. The elongated light source 110 is firmly positioned inside the corresponding first tube 120, such that the first tube 120 covers the corresponding elongated light source 110. The first tube 120 is rotatable within the second tube 130, such that the second tube 130 covers the first tube 120 (completely), the elongated light source 110 and the first tube 120 being rotatable within the inner volume of the second tube 130.

[0040] The elongated light source 110 and the first tube 120 are fixed together, such that rotation or movement of the elongated light source 110 results in equivalent rotation or movement of the first tube 120, and vice versa. If there was only the elongated light source 110 without a tube fixed thereto, rotating the elongated light source 110 by driving it at one end can result in the light source (e.g. formed as a long strip as its substrate) to twist. Since the first tube 120 firmly holds the elongated light source 110, the risk of the elongated light source 110 to twist during rotation is reduced.

[0041] Accordingly, conceptually, each elongated lighting element 101 comprises an inner tube 120 (labeled as first tube 120) that houses the elongated light source 110, and an outer tube 130 (labeled as second tube 130) that surrounds the inner tube 120, the inner tube being rotatable therein.

[0042] In examples, the first / inner tube is placed concentrically with the second / outer tube. This advantageously reduces any change in the distance between the elongated light source 110 and the second tube 130 during rotation of the elongated light source, thereby mitigating any impact on any lighting characteristic of the light output by the lamp 100 during or after rotation of the elongated light source 110 (beyond the light angle).

[0043] The elongated lighting element 101 further comprises a rotation mechanism 140 configured to facilitate rotation of the elongated light source 110 and the first tube 120 within the second tube 130.

[0044] In particular, the elongated light source 110 and the first tube 120 are preferably configured to rotate (within the second tube, i.e. within the inner volume of the second tube) about an axis X. The rotation mechanism 140 is preferably configured to control or otherwise facilitate rotation of the elongated light source 110 and the first tube 120 (within the second tube 130) about the axis X.

[0045] In a particular example, the rotation mechanism can be engaged with the first tube and / or the elongated light source and control rotation of the elongated light source and the first tube within the second tube.

[0046] For example, the rotation mechanism can comprise a rotatable knob 145 with which a person can interact to control or limit rotation of the elongated light source 110 and the first tube 120 within the second tube 130. Hence, the rotation mechanism can comprise a knob to facilitate manual rotation of the elongated light source and the first tube.

[0047] As an alternative example, the rotation mechanism can comprise an electric motor configured to controllably rotate the elongated light source 110 and the first tube 120. For example, the electric motor can be controlled by a controller responsive to user input and / or (wireless) communication. This allows, for example, remote and / or precise control of the rotation of the elongated light source and the first tube.

[0048] As another example, the rotation mechanism can comprise a handle manually operable by a person to control rotation of the elongated light source 110 and the first tube 120.

[0049] Hence, the rotation mechanism can comprise a manually operable element (e.g. a knob or a handle) with which a person can interact to control or limit rotation of the elongated light source 110 and the first tube 120 within the second tube 130.

[0050] In a preferred embodiment, the rotation mechanism is configured to facilitate rotation of the elongated light source and the first tube around the axis of no more than 360°, for example no more than 300°. This can be achieved by using suitably positioned stops or blockers, or by suitably controlling or limiting the rotation mechanism (e.g. a software limit in a controller of the electric motor).

[0051] In some examples, the rotation mechanism is configured to facilitate rotation of the elongated light source and the first tube around the axis of no less than 180°, for example no less than 220°. This provides a good range of rotation for controlling or limiting the direction of light emitted by the elongated lighting element(s).

[0052] The rotation mechanism 140 can be fixedly connected to the elongated light source 110 and the first tube 120 only at a single end of the elongated lighting element, which can reduce the size of the overall lamp 100.

[0053] In a particular example, the rotation mechanism 140 is configured to facilitate rotation of the elongated light source only by exerting a rotational force at a single end of the elongated lighting element. The advantage of reducing the risk of twisting of the elongated light source is particularly pronounced if the rotational force can only be exerted at a single end of the elongated lighting element. This approach also improves the compactness of the lamp, for example by requiring only one or more elements of the rotation mechanism 140 for exerting a rotational force at a single end of the elongated lighting element.

[0054] The elongated light source 110 is configured to emit light from a light emitting surface. In particular, the elongated light source 110 can comprise or be formed by a linear array of light emitting elements (such as LEDs) positioned on a support. Rotation of the elongated light source rotates or changes the (central) direction of the light output by the elongated light source relative to the overall lamp 100.

[0055] The first tube 130 comprises a light exit window formed by a first light transmissive material covering the light emitting surface. As an example, the entirety of the first tube can be formed by the first light transmissive material. As another example, at least the portion of the first tube that receives light emitted by the elongated light source can be formed by the first light transmissive material.

[0056] The second tube 130 comprises a second light transmissive material. In particular, the second tube comprises the second light transmissive material at any location on the second tube 130 where light emitted by the elongated light source (for any rotation of the elongated light source) impinges. Thus, regardless of which direction or rotation the elongated light source 110 and the first tube 120 are oriented relative to the second tube 130, light generated by the elongated light source can still be emitted from the lamp 100. Thus, if the elongated light source is capable of performing a 360° rotation, the entire second tube can be formed by the second light transmissive material. If the elongated light source can only perform a rotation of up to 270°, the second tube does not need to be entirely formed by the second light transmissive material.

[0057] Examples of suitable light transmissive materials are known in the art, such as glass and some plastics. The first and second light transmissive materials can be the same to improve ease of manufacturing, but this is not essential. For example, the first tube can be formed by a first material that is more brittle but also more light transmissive than the second material - to improve efficiency of the lamp without significantly impacting robustness of the lamp.

[0058] The second tube 130 can be fixedly secured (i.e. fixed or mounted) to the first support portion 150 and the second support portion 160. As a working example, the second tube 130 can be adhered (e.g. using an adhesive) to the first support portion and the second support portion. The skilled person will be aware of other methods of fixing the second tube to the first support portion and the second support portion, for example screw-based fixing mechanisms, clip-based fixing mechanisms, etc.

[0059] The first tube 120 can comprise one or more protrusions 125 located inside the first tube. Thus, the first tube 120 can comprise one or more protrusions 125 extending from an inner surface of the first tube inside the inner tube.

[0060] The protrusion(s) 125 can be used to mount the elongated light source 110 in which the elongated lighting elements are. In particular, the protrusion(s) 125 can clamp or secure the elongated light source 110 between itself and the inner wall 126 or inner surface of the first tube 120. This provides a securing mechanism and surface for mounting the elongated light source 110 to the first tube 120. However, in other examples, the elongated light source 110 is coupled or secured directly to the first tube 120 (of the inner wall 126), e.g. using an adhesive or the like, in the absence of any such protrusions 125.

[0061] The rotation mechanism 140 can be configured to engage with the one or more protrusions 125 to control rotation of at least the first tube 120 and the elongated light source 110. This provides a reliable connection between the rotation mechanism 140 and the first tube 110.

[0062] As Figure 1 illustrated, each elongated lighting element 101, 102 can extend (substantially) parallel to each other. Thus, the respective axis along which each elongated lighting element extends can be parallel to each other. In the context of the present disclosure, the term parallel means substantially parallel, i.e. parallel within an acceptable error range. Thus, the angle between two elongated lighting elements can be 0°, in certain cases with an acceptable error range (e.g. ±5°, or more preferably ±1°). This can account for manufacturing tolerances, variances and / or requirements.

[0063] In the illustrated example, the rotation mechanism 140 of each elongated lighting element 101, 102 facilitates rotation of the first tube 120, independent of the rotation of the first tube of any other elongated lighting element. In other words, the elongated lighting elements 101, 102 can be configured such that rotation of the first tube is independent of the rotation of any other first tube in the lamp 100.

[0064] Figure 1 It is also shown how the first support portion 150 comprises a respective aperture or hole 150A for each elongated lighting element, each hole being configured to receive a respective elongated lighting element. Each hole of the plurality of holes is configured to the shape of each elongated lighting element 101, 102, i.e. has a geometry that is complementary to the respective filament element to receive the respective elongated lighting element therein.

[0065] For example, according to the example illustrated in Figure 1 the opening of each hole 150A can be circular to match the tubular shape of each second tube 130. In other words, the cross-section of the hole 150A in a first plane perpendicular to the axis X can be equal to the cross-section of the elongated lighting element 101, 102 (in particular the second tube of each elongated lighting element 101, 102) in a second plane parallel to the first plane.

[0066] In some examples, the lamp 100 further comprises a respective spacing element 150B for each elongated lighting element 101, 102. The spacing element 150B can be configured to be mounted within the second tube 130 of the elongated lighting element 101 and coupled to the first tube 120 of the elongated lighting element to facilitate easier rotation of the first tube 120 relative to the second tube 130. The spacing element 150B is inserted within the outer tube to define a non-zero distance between the second tube and the inner tube at the first end of the elongated lighting element. This distance helps to prevent or reduce the likelihood of any glue or adhesive fixing the first (inner) tube to the second (outer) tube in case a large (e.g. excessive) amount of adhesive or glue is applied to fix the second tube to the first support portion.

[0067] Each spacing element 150B can be considered to form part of a respective rotation mechanism of the elongated lighting element, as it assists or facilitates providing the functionality of rotating the first tube 120 within the second tube 130.

[0068] When the first support portion 150 comprises a hole or aperture 150A for each elongated lighting element, the spacing element 150B (for each elongated lighting element) can be positioned or located within the corresponding hole or aperture. This provides structural support for the spacing element and for supporting the entire elongated lighting element.

[0069] Although illustrated as being substantially the same size and / or shape, each elongated lighting element does not necessarily have to be configured in this way. For example, the size of the second tube(s) can differ from each other, e.g. to facilitate different lighting modes and / or to meet different environmental lighting requirements.

[0070] Preferably, the length of each elongated lighting element is not less than 0.3m, e.g. not less than 0.5m. The proposed approach is particularly advantageous when applied to longer elongated lighting elements, as the risk of the elongated lighting element or elongated light source twisting and / or deforming during rotation of the longer elongated light source increases with length, which can be mitigated by using the proposed lamp.

[0071] Figure 2 A magnified view of a portion of the lamp is provided, providing further illustrative details for one example of the rotation mechanism 140 and a portion of the elongated lighting element. In particular, Figure 2 This helps to illustrate the positional relationship between the elongated light source 110, the first tube 120 and the second tube 130.

[0072] Figure 2An embodiment of the elongated light source is also illustrated. In particular, each elongated light source can comprise a linear array of LEDs 111 or LED chips mounted on a substrate 112. In each elongated light source, the substrate 112 can for example embody a printed circuit board (PCB) substrate. In each elongated light source, the linear array of LEDs can comprise no less than 20 LEDs, for example no less than 30 LEDs.

[0073] As Figure 2 As shown in the middle part, the second support portion 160 can comprise spacers 161 and rotation mechanism fixation elements 162. The spacers 161 define a distance or gap between the elongated lighting elements at the second end of each elongated lighting element. The rotation mechanism fixation elements 162 fix each rotation mechanism 140 to the spacers 161.

[0074] More specifically, the spacers 161 and the rotation mechanism fixation elements 162 are configured to define a distance or position of (a part of) the rotation mechanism 140 of each elongated lighting element relative to each other. Thus, the second support portion 160 can be configured to define a distance or position of (a part of) the rotation mechanism 140 of each elongated lighting element relative to each other. Since the rotation mechanism 140 (of each elongated lighting element) can be engaged with the first tube 120 and / or the elongated light source 110 (to facilitate control of the rotation), the second support portion can indirectly define a position of each first tube 120 (and correspondingly each elongated light source) relative to its corresponding second tube 130.

[0075] In each elongated lighting element, the rotation mechanism 140 can be dimensioned or configured to cover a boundary between the inner surface of the first tube and the end face of the first tube.

[0076] In particular, in each elongated lighting element, the rotation mechanism 140 can comprise a protruding portion 141 extending into the first tube (e.g. to partially cover the inner surface of the tube) and a flange 142 covering (at least partially) the end face of the first tube, such that the boundary between the inner surface and the end face is covered by the rotation mechanism. In each elongated lighting element, the protruding portion 141 can be engaged or fixed to the first tube 120 and / or the elongated light source 110. Thus, in each elongated lighting element, the protruding portion can extend from the flange 142 towards the first tube 120.

[0077] As mentioned before, in each elongated lighting element, the rotation mechanism 140 can further comprise a knob 145 or other manually operable element to facilitate manual rotation. In particular, in each elongated lighting element, the knob can extend from the flange 142, in a direction opposite to the protruding portion 141.

[0078] Figure 3A top view of the lamp 100 is provided. This better illustrates the positional relationship between the elongated lighting elements, and more specifically, how the elongated lighting elements extend parallel to each other between the first support 150 and the second support 160.

[0079] Figure 4 A perspective view of the lamp 100 is provided to provide a more complete overview of the lamp 100.

[0080] Figure 5 A partial exploded view of the lamp 100 is provided, showing some optional variations of the first support portion 150 and the second support portion 160.

[0081] The first support portion 150 can comprise a first housing element 151 and a second housing element 152. The first and second housing elements 151, 152 can be connected together, for example by one or more connecting elements 153, such as screws, clips or other fixation mechanisms (e.g. hook-and-loop fastener - commonly known as Velcro, or adhesive).

[0082] In some examples, the first and second housing elements 151, 152 can be configured to house electronic circuitry 155 therebetween or therein. In particular, when connected together, the first and second housing elements can define an enclosed volume in which the electronic circuitry 155 is positioned. The electronic circuitry can comprise drive circuitry, control circuitry and / or communication circuitry of the lamp 100.

[0083] The electronic circuitry 155 can be connected with each elongated light source 110 by a respective set of one or more electrical wires and / or brushes. Using one or more brushes to establish a connection between the electronic circuitry and each elongated light source can significantly reduce the risk of damaging this electrical connection during or after any rotation of the elongated light source. However, in certain use scenarios, it can be acceptable to use a set of one or more electrical wires for establishing an electrical connection with one or more elongated light sources, for example, where the maximum allowed rotation of any elongated light source relative to its respective second tube is fixed (e.g. the elongated light source cannot be rotated arbitrarily).

[0084] As an alternative to separate first and second housing elements, the first support portion 150 of some lamps 100 can comprise a single housing element configured to contain or hold the electronic circuitry.

[0085] In some examples, each elongated lighting element is electrically connected only by the electronic circuitry housed or contained in the first support portion 150. As a result, each elongated lighting element can be electrically connected only by a single end (the first end 101A).

[0086] Figure 5The optional spacer 161 and the rotation mechanism fixing element 162 are also better shown, clearly demonstrating how these elements cooperate to fix to the rotation mechanism 140 of each elongate lighting element.

[0087] Figure 5 A zoomed view of a portion of the elongate light source 110 of the elongate lighting element and the first tube 120 is also provided. In particular, this zoomed view more clearly demonstrates how the first tube comprises one or more protrusions 125 that can hold or grip the elongate light source 110 to hold it in place.

[0088] Figure 6 Another exploded view of the lamp 100 is provided to better illustrate the elements of the elongate lighting element. In Figure 6 In the figures, the dashed double line represents a virtual assembly of the lamp 100.

[0089] Those skilled in the art, having the benefit of the present description, will appreciate that various modifications can be made to the disclosed embodiments in light of the teachings herein. In the claims, the word "comprising" does not exclude other elements or steps not specified. The indefinite articles "a" or "an" do not exclude a plurality.

[0090] The mere fact that measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

[0091] If the term "adapted to" is used in the claims or specification it should be noted that the term "adapted to" should be equivalent to the term "configured to." If the term "means" is used in the claims or specification it should be noted that the term "means" should be equivalent to the term "system," and vice versa.

[0092] Any reference signs in the claims should not be construed as limiting the scope.

Claims

1. A lamp comprising two or more elongate lighting elements, characterized in that, Each elongated lighting element comprises: an elongated light source configured to emit light from a light emitting surface; a first tube covering the elongated light source, wherein the first tube is fixedly secured to the elongated light source and comprises a light exit window formed of a first light transmissive material covering the light emitting surface; a second tube comprising a second light transmissive material covering the first tube entirely, wherein the first tube is positioned inside the second tube and the first tube is rotatably coupled to the second tube; and a rotation mechanism configured to facilitate rotation of the elongated light source and the first tube within the second tube; wherein each elongated lighting element extends from a first end to a second end, the lamp further comprising: a first support portion configured to support the first end of each elongated lighting element; and a second support portion configured to support the second end of each elongated lighting element; the second tube of each elongated lighting element is fixedly secured to both the first support portion and the second support portion; wherein: the first support portion comprises electronic circuitry for powering the elongated light source; and the elongated light source is electrically connected only through the electronic circuitry.

2. The lamp of claim 1, wherein the second tube of each elongated lighting element is fixedly secured to the first support portion and the second support portion through an adhesive.

3. The lamp of claim 2, wherein Each elongated lighting element extends parallel to each other.

4. The lamp of claim 1, wherein For each elongated lighting element, the rotation mechanism comprises a knob for facilitating manual rotation of the elongated light source and the first tube.

5. The lamp of claim 1, wherein The first support portion and the second support portion maintain the position of the second tube of each elongated lighting element relative to each other.

6. The lamp of claim 5, wherein The second support portion comprises spacers for maintaining the position of the second end of the elongated lighting elements relative to each other.

7. The lamp of claim 1, wherein For each elongated lighting element, the rotation mechanism covers a boundary between an inner surface of the first tube and an end surface of the first tube.

8. The lamp of claim 1, wherein For each elongated lighting element, the first tube comprises one or more protrusions inside the first tube.

9. The lamp of claim 8, wherein, The rotation mechanism engages with the one or more protrusions to control the rotation of at least the first tube.

10. A lamp as claimed in claim 8 or 9, characterized in that For each elongated lighting element, each protrusion extends from an inner wall of the first tube towards the elongated light source.

11. The lamp of claim 1, wherein For each elongated lighting element, the rotation mechanism facilitates rotation of the first tube independently of the rotation of the first tube of any other elongated lighting element.

12. The lamp of claim 1, wherein, For each elongated lighting element, the first tube is placed concentrically with the second tube.

13. The lamp of claim 1, wherein For each elongated lighting element, the rotation mechanism is configured to facilitate rotation of the elongated light source and the first tube about an axis (X) extending through the elongated lighting element.

14. The lamp of claim 13, wherein, For each elongated lighting element, the rotation mechanism is configured to facilitate rotation of the elongated light source and the first tube about the axis by no more than 360 degrees.

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