Optical synchronization for lighting devices

Abstract

The invention is titled "Optical Synchronization for Lighting Devices". The present disclosure generally relates to a "synchronization" mechanism that enables a customer to flexibly adjust the light output distribution of a lighting device to a desired level. The "synchronization" mechanism provides flexibility in adjusting the position of a retaining ring of an LED system relative to a mounting module including a heat sink adapter housing.

Description

Technical Field

[0001] The present disclosure generally relates to light emitting diode (LED) lighting systems, and more particularly to LED lighting devices. Background Art

[0002] Light emitting diodes (LEDs) can provide instant illumination without preheating. LED lighting devices are designed to provide maintenance-free operation while offering long life and high lumen performance. The lighting devices employ custom optics that are designed to maximize light distribution and intensity while providing flexibility for retrofit or new installation across the site.

[0003] The light emitted from the LED lighting device can be distributed over the lighting area in a predetermined orientation and pattern. The lighting device can have three optical options that are designed to maximize light distribution and intensity. The pattern of the lighting area of the LED lighting device is defined by the Illuminating Engineering Society of North America (IESNA). The IESNA Type I provides an optical pattern of a long rectangular light distribution, which can be applicable to corridors, walkways, loading docks, catwalks, etc. The IESNA Type III provides an optical pattern with a three-way light distribution, which is applicable to narrow crosswalks, passageways with wall-mounted fixtures, tunnels with wall-mounted brackets, etc. The IESNA Type V provides an optical pattern of a regular circular distribution pattern, which is applicable to high / low bay indoor and outdoor ceilings, chandeliers, large buildings, warehouses, etc.

[0004] The light distribution from the lighting device may be offset or misaligned relative to roads, sidewalks, etc. Therefore, the IESNA Type I and IESNA Type III optical patterns can be adjusted on-site as needed.

[0005] Therefore, improved flexibility is needed when adjusting the beam output of the lighting device. Summary of the Invention

[0006] The present disclosure generally relates to a "synchronization" mechanism that enables a customer to flexibly adjust the light output distribution of a lighting device to a desired level or orientation, so that a given light distribution pattern effectively illuminates a desired location. The "synchronization" mechanism provides flexibility in adjusting the position of the retaining ring of the LED system relative to the mounting module including the heat sink adapter housing.

[0007] These and other features and advantages will be apparent from reading the following detailed description and viewing the related drawings. It should be understood that both the foregoing general description and the following detailed description are merely exemplary and explanatory and do not limit the broad concepts on which the embodiments disclosed herein are based. Brief Description of the Drawings

[0008] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate several aspects of the present disclosure. A brief description of the drawings is as follows:

[0009] Figure 1 A side view of a lighting system in accordance with the principles of the present disclosure is shown;

[0010] Figure 2 Shows Figure 1 A cross-sectional side view of the lighting system of

[0011] Figure 3 Shows Figure 1 An exploded view of the LED system of the lighting system of

[0012] Figure 3A Shows Figure 2 A partial cross-sectional view of

[0013] Figure 4 A schematic diagram showing three exemplary light distribution optical patterns for a lighting system in accordance with the principles of the present disclosure;

[0014] Figure 5 Shows Figure 1 A front plan view of the lighting system of , which depicts an LED configuration adapted to generate a type I optical pattern;

[0015] Figure 6 Shows Figure 1 A front plan view of the lighting system of , which depicts an LED configuration adapted to generate a type III optical pattern;

[0016] Figure 7 Shows Figure 1 A front plan view of the lighting system of , which depicts an LED configuration adapted to generate a type V optical pattern;

[0017] Figure 8 Shows Figure 3 A front plan view of the retaining ring of the LED system shown in

[0018] Figure 9 Shows Figure 8 A rear plan view of the retaining ring of

[0019] Figure 10 Shows Figure 8 A cross-sectional view of the retaining ring of

[0020] Figure 11 Shows Figure 1 A partial exploded view of the lighting system of , showing the LED system disassembled from the heat sink adapter housing;

[0021] Figure 12Shows a partially enlarged front view of the heat sink adapter housing before the LED system is installed on the heat sink adapter housing;

[0022] Figure 13 Shows an exploded view of an alternative LED system in accordance with the principles of the present disclosure;

[0023] Figure 14 Shows Figure 13 a cross-sectional view of the LED system; and

[0024] Figure 15 Shows a partial view showing Figure 13 the retaining ring and the base plate of the LED system. Detailed Description

[0025] Reference will now be made in detail to the exemplary aspects of the present disclosure shown in the drawings. Whenever possible, the same reference numerals will be used throughout the drawings to refer to the same or like features.

[0026] Figures 1 to 2 Shows an exemplary lighting system 100. The lighting system 100 includes a driver compartment 102, a heat sink adapter housing 104 (e.g., a housing), and an LED system 106 (e.g., a light engine). The driver compartment 102 is configured to house a driver assembly (not shown), which may include a power source and enable its operation. In some examples, the lighting system 100 may be mounted to a ceiling, wall, or other structure via a mounting bracket (not shown) fixed to the driver compartment 102. It should be understood that the lighting system 100 includes a front side configured to face away from the wall or ceiling to which the lighting system 100 is mounted, and a rear side configured to face the wall or ceiling to which the lighting system 100 is mounted.

[0027] The heat sink adapter housing 104 may be coupled to the driver compartment 102 to be fixed thereto. The heat sink adapter housing 104 includes a plurality of parallel-oriented fins 108 integrally formed with a base 110 to ensure good thermal conductivity. Any heat generated by the LED system 106 can be drawn into the heat sink adapter housing 104 to dissipate the heat. That is, the heat sink adapter housing 104 acts as a heat sink (thermal conduction) to distribute the heat and provide a relatively large surface area to allow heat transfer to the surrounding air. The heat sink adapter housing 104 may be made of aluminum, brass, copper, polymer steel, or any other material with good thermal conductivity. The base 110 of the heat sink adapter housing 104 has a front surface 112 that provides a mounting platform 114 for the LED system 106. The LED system 106 may be removably mounted to the front surface 112 of the heat sink adapter housing 104 by one or more fasteners 116 (see Figure 11 ).

[0028] Go to Figure 3 , which shows an exploded view of the LED system 106. The LED system 106 can include a base plate 118, a retaining ring 120, and an LED subassembly 122. The LED subassembly 122 can include a printed circuit board assembly (PCBA) 124 and an optical device 126. The optical device 126 can include one or more light emitting diodes (LEDs) 128 coupled to a substrate 130. The PCBA 124 can provide the necessary electrical connections to the optical device 126 and other electrical components of the lighting system 100.

[0029] The base plate 118 includes an outer surface 132 that can be covered by a thermal pad 134. An adhesive on the thermal pad 134 adhesively attaches the thermal pad 134 to the outer surface 132 of the base plate 118. The optical device 126 and the PCBA 124 can be fastened together to the base plate 118 with a plurality of screws 136 to relatively fix the optical device 126 within the LED system 106.

[0030] A first washer 138 can be disposed in a groove 140 in the outer surface 132 of the base plate 118. When the retaining ring 120 is attached to the base plate 118, the first washer 138 can be pressed into the groove 140 to establish an environmental seal with the back side of the outer flange 145 of the protective lens 146. The retaining ring 120 can be attached to the base plate 118 via one or more screws 144, where a second washer 142 is located between the retaining ring 120 and the front side of the outer flange 145 of the lens 146. The first washer 138 and the second washer 142 can provide a seal as Figure 3A shown, which provides appropriate ingress protection against the intrusion of solids and liquids (i.e., dust, dirt, accidental contact, and water) into the compartment defined by the protective lens 146.

[0031] As described above, the LED system 106 can further include a lens 146 having an outer flange disposed (e.g., clamped) between the base plate 118 and the retaining ring 120. The lens 146 can at least partially surround the optical device 126 and the PCBA 124 and encapsulate them on the base plate 118. The lens 146 can be made of any at least partially transparent or translucent material, including glass and hard plastic, so that light can be emitted from the lighting system 100. The lens 146 can also provide a protective barrier for the optical device 126 and protect the optical device 126 from moisture or inclement weather. The retaining ring 120 is configured to hold all components of the LED system 106 together. One or more screws 144 mount the retaining ring 120 to the base plate 118 to form the LED system 106 as a fixed unit.

[0032] In operation, the optical device 126 can emit light such that the illumination system 100 can illuminate a desired or expected area. The light emitted from the optical device 126 can be distributed over the desired illumination area in a predetermined orientation and pattern. That is, the illumination system 100 can be configured for a specific light distribution profile to project a predetermined light pattern onto a surface (e.g., a sidewalk or a road).

[0033] Reference Figure 4 , the Illuminating Engineering Society of North America (IESNA) has developed a classification system for describing the patterns of the illuminated areas of the illumination system 100. The IESNA Type I beam pattern has a long rectangular pattern that is used when the illumination system 100 is placed near the center of a path and provides illumination for a narrow path or road. The IESNA Type III beam pattern has a curved pattern that is used when the illumination system 100 is placed toward one side of a path and provides more outwardly projected illumination. The IESNA Type V beam pattern has a regular circular pattern and is used for large buildings, warehouses, processing plants, and industrial buildings. Figures 5 to 7 Exemplary IESNA Type I, Type III, and Type V optical devices 126a - 126c that can be used in the illumination system 100 are shown.

[0034] Reference Figures 8 to 10 , multiple views of the retaining ring 120 are shown. The retaining ring 120 includes four equally spaced mounting areas 148 around the outer perimeter 150 of the retaining ring 120. The retaining ring 120 can rotate about the central axis X of the illumination system 100. The mounting areas 148 can allow the retaining ring 120 to be adjustably rotated at least 180 degrees to change the light distribution illumination direction of the illumination system 100. In certain examples, the retaining ring 120 can be rotated between 45 degrees and 300 degrees to change the light distribution of the illumination system 100.

[0035] The mounting areas 148 of the retaining ring 120 can be used to attach the LED system 106 to the front surface 112 of the heat sink adapter housing 104 via one or more screws 116. The screws 116 can be fitted into screw holes 152 (e.g., holes with internal threads, openings, see Figures 5 to 7 ) on the front surface 112 of the heat sink adapter housing 104. In certain examples, the shape and size of the retaining ring 120 can be set to engage a cavity 154 defined in the heat sink adapter housing when the LED system 106 is attached to the heat sink adapter housing 104 (see Figure 3 ).

[0036] The mounting regions 148 can each include a plurality of discrete openings 156, although alternative configurations are possible. The plurality of discrete openings 156 are spaced in an arcuate array and are located near the outer perimeter 150 of the retaining ring 120. In some examples, the mounting regions 148 can each include slot openings 154 (see Figure 15 ). The mounting regions 148 are radially positioned about the retaining ring 120 and are identical to each other. Accordingly, only one mounting region 148 will be described in detail or referred to. Each of the mounting regions 148 can correspond to a circumferential flange segment 149. The circumferential flange segments 149 can be separated by projections 151. In one example, the plurality of discrete openings 156 do not have internal threads and are slightly oversized with respect to the shank of the fastener 116.

[0037] The front surface 112 of the radiator adapter housing 104 defines at least four screw holes 152 that are equidistantly spaced about the radiator adapter housing 104. The screw holes 152 can each be aligned with a corresponding one of the plurality of parallel-oriented fins 108 of the radiator adapter housing 104. For example, four screw holes 152 can be defined in respective ones of the plurality of parallel-oriented fins 108. In some examples, each screw hole 152 corresponds to one of the mounting regions 148.

[0038] In some examples, there are at least six openings 156 at each mounting location 148 for each of the screw holes 152 of the radiator adapter housing 104. In some examples, there are at least seven openings 156 at each mounting location 148 for each of the screw holes 152 of the radiator adapter housing 104. In some examples, there are at least eight openings 156 at each mounting location 148 for each of the screw holes 152 of the radiator adapter housing 104. In some examples, there are at least nine openings 156 at each mounting location 148 for each of the screw holes 152 of the radiator adapter housing 104. In some examples, there are at least ten openings 156 at each mounting location 148 for each of the screw holes 152 of the radiator adapter housing 104.

[0039] Although the mounting regions 148 are shown on the retaining ring 120 and the screw holes 152 are defined by the radiator adapter housing 104, the reverse can be provided. That is, the mounting regions 148 can be defined by the radiator adapter housing 104 and the screw holes 152 can be defined by the retaining ring 120.

[0040] Reference Figure 12, when the LED system 106 is installed onto the heat sink adapter housing 104, one of the plurality of discrete openings 156 of the retaining ring 120 can be respectively aligned with one of the screw holes 152 of the heat sink adapter housing 104. To fix the LED system 106 to the heat sink adapter housing 104, one of the fasteners 116 can be axially inserted into one of the plurality of discrete openings 156 and screwed into the screw hole 152 of the heat sink adapter housing 104. This engagement prevents any movement of the LED system 106 relative to the heat sink adapter housing 104.

[0041] Since lighting devices are typically placed next to sidewalk or conveyor positions where the light distribution relative to the road may not be fully utilized, a "synchronization" mechanism can be provided to enable customers to flexibly adjust the light distribution and thus provide lighting in a desired direction, orientation, or level.

[0042] The retaining ring 120 can be configured to change or otherwise modify the light emitted by the optical device 126. When the customer desires to "synchronize" the lighting device or adjust the lighting path or pattern of the optical device 126 of the lighting system 100, the LED system 106 can be rotated relative to the heat sink adapter housing 104. The amount of rotation required to achieve the desired light distribution can be determined by using the retaining ring 120. Rotating the retaining ring 120 also rotates the base plate 118, the PCBA 124, and the optical device 126 of the LED system 106. Since the optical device 126 can rotate together with the retaining ring 120, the lighting direction of the light emitting pattern of the lighting system 100 can be adjusted.

[0043] To adjust the lighting direction of the lighting system 100, first completely remove the fastener 116 from the corresponding one of the plurality of discrete openings 156 of the retaining ring 120 and the screw hole 152 of the heat sink adapter housing 104. This allows the LED system 106 to be removed from the heat sink adapter housing 104 to permit the LED system 106 to rotate relative to the heat sink adapter housing 104, thereby adjusting the synchronization plane position and thus the lighting direction of the lighting system 100. The plurality of discrete openings 156 of the retaining ring 120 allow the LED system 106 to move in discrete increments, thereby achieving the desired light distribution within the field where optimal performance can be achieved. For example, the plurality of discrete openings 156 of the retaining ring 120 can be rotated clockwise or counterclockwise relative to the screw hole 152 of the heat sink adapter housing 104 to change the lighting direction of the light distribution by increments of the plurality of discrete openings 156. That is, the direction of the light distribution of the lighting system 100 can be adjusted when rotating the retaining ring 120 of the LED system 106 such that a different one of the plurality of discrete openings 156 of the retaining ring 120 can be aligned with the screw hole 152 of the heat sink adapter housing 104.

[0044] Go back toFigure 8 ,the plurality of discrete openings 156 may be spaced no more than 10 degrees relative to the central axis X of the illumination system 100. In some examples, the plurality of discrete openings 156 may be spaced no more than 9 degrees relative to the central axis X of the illumination system 100. In some examples, the plurality of discrete openings 156 may be spaced no more than 8 degrees relative to the central axis X of the illumination system 100. Thus, the light distribution illumination direction can be changed by relatively small increments (e.g., increments less than or equal to about 10 degrees, 9 degrees, or 8 degrees).

[0045] After the desired adjustment is made, the fastener 116 can be reinserted through a selected one of the plurality of openings 156 in the retaining ring 120 and screwed into the screw hole 152 of the heat sink adapter housing 104. This "synchronized" process allows for easy adjustment of the lighting device in the field without having to remove one or more screws 144 that seal the LED system 106. The screws 144 keep the LED system 106 tightly fastened and sealed so that the LED system 106 does not loosen or break, posing a risk to any ingress protection.

[0046] Reference Figures 13 to 15 ,an alternative LED system 106a is depicted in accordance with the principles of the present disclosure. To the extent that the embodiments are similar, the description will not be repeated, but rather the main differences will be addressed. Specifically, the LED system 106a differs in how the retaining ring 120a is mounted to the base plate 118a. For example, an adhesive tape 158 can be used to secure the retaining ring 120a and the base plate 118a together. Thus, when the adhesive tape 158 replaces the screw 144, the number of parts is reduced. The adhesive tape 158 can be a double-sided adhesive film. In some examples, the adhesive tape 158 may have a tensile load capacity of 30 Newtons to 40 Newtons (N). In some examples, the adhesive tape 158 preferably has a tensile strength of about 300 N to about 350 N.

[0047] Additionally, the LED system 106a differs from the LED system 106 shown in Figure 3 in that the mounting area 148a of the retaining ring 120a includes a slot opening 154 instead of discrete openings, but it should be understood that the discrete openings described above can be used. The fastener 116a can be inserted through the slot opening 154 of the retaining ring 120a into the screw hole 152 of the heat sink adapter housing 104a to attach the LED system 106a to the heat sink adapter housing 104a.

[0048] The slot opening 154 defined in the retaining ring 120a allows the LED system 106a to be "synchronized" relative to the heat sink adapter housing 104a in a desired direction by loosening but not removing the fastener 116a positioned within the slot opening 154 of the retaining ring 120a. The fastener 116a can be withdrawn from the slot opening 154 to expose 1 / 4 inch to 1 / 2 inch of thread to allow the LED system 106a to rotate relative to the heat sink adapter housing 104a by up to about 60 degrees, thereby changing the light distribution. In some examples, the "synchronized" direction can include adjustability of at least about 45 degrees.

[0049] In some examples, if an adjustment greater than about 60 degrees is needed, the fastener 116a can be completely removed from the slot opening 154. The LED system 106a can then be adjusted to any desired position. After the light distribution adjustment is complete, the fastener 116a can then be reinserted through the slot opening 154 of the retaining ring 120a into the screw hole 152 of the heat sink adapter housing 104a and tightened therein to again secure the LED system 106a to the heat sink adapter housing 104a.

[0050] Exemplary aspects of the present disclosure

[0051] Aspect 1. A lighting system, comprising:

[0052] A driver compartment assembly;

[0053] A heat sink adapter housing fixed to the driver compartment assembly, the heat sink adapter housing defining a plurality of openings, each of the plurality of openings having internal threads;

[0054] A light engine adapted to be removably attached to the heat sink adapter housing, the light engine comprising:

[0055] A base plate;

[0056] Optics coupled to the base plate;

[0057] A retaining ring removably mounted to the base plate, the retaining ring including a plurality of mounting regions circumferentially positioned therearound, wherein each of the plurality of mounting regions includes a plurality of discrete openings equidistantly spaced in an arcuate array, each of the plurality of mounting regions corresponding to a circumferential flange segment of the retaining ring, the circumferential flange segments of the retaining ring being separated by protrusions, the plurality of discrete openings being respectively defined as passing through the circumferential flange segments; and

[0058] A lens having an outer flange disposed between the base plate and the retaining ring, the lens at least partially surrounding the optics to encapsulate the optics on the base plate;

[0059] Wherein the retaining ring is capable of rotating relative to the heat sink adapter in discrete increments via the plurality of discrete openings, each of the plurality of discrete openings of the plurality of mounting regions corresponding to one of the plurality of openings of the heat sink adapter, wherein the optical device rotates with the retaining ring to change the illumination direction of the light distribution emitted by the optical device.

[0060] Aspect 2. The lighting system according to aspect 1, wherein the optical device includes one or more light emitting diodes coupled to a substrate.

[0061] Aspect 3. The lighting system according to aspect 1, wherein the plurality of discrete openings are spaced no more than 8 degrees relative to the central axis of the lighting system.

[0062] Aspect 4. The lighting system according to aspect 1, wherein the plurality of discrete openings are spaced no more than 10 degrees relative to the central axis of the lighting system.

[0063] Aspect 5. The lighting system according to aspect 1, wherein the optical device includes an IESNA Type I beam pattern.

[0064] Aspect 6. The lighting system according to aspect 1, wherein the optical device includes an IESNA Type III beam pattern.

[0065] Aspect 7. The lighting system according to aspect 1, wherein the plurality of mounting regions allow the retaining ring to be adjustably rotated at least 180 degrees to change the illumination direction of the light distribution of the optical device.

[0066] Aspect 8. The lighting system according to aspect 1, wherein the plurality of discrete openings include at least eight discrete openings in the mounting region.

[0067] Aspect 9. A light engine, comprising:

[0068] A base plate;

[0069] An optical device coupled to the base plate;

[0070] A retaining ring adhesively attached to the base plate;

[0071] A heat sink adapter housing removably mounted to the retaining ring; and

[0072] A lens having an outer flange disposed between the base plate and the retaining ring, the lens at least partially surrounding the optical device to encapsulate the optical device on the base plate;

[0073] Wherein the retaining ring and the optical device are configured to rotate together relative to the heat sink adapter housing to change the illumination direction of the light distribution emitted by the optical device.

[0074] Aspect 10. The light engine according to aspect 9, wherein the retaining ring includes four separate mounting regions circumferentially positioned therearound, each of the four separate mounting regions corresponding to a circumferential flange segment of the retaining ring, the circumferential flange segments of the retaining ring being separated by protrusions.

[0075] Aspect 11. The light engine according to aspect 10, wherein each of the four separate mounting regions includes at least five discrete openings.

[0076] Aspect 12. The light engine according to aspect 10, wherein each of the four separate mounting regions includes at least eight discrete openings.

[0077] Aspect 13. The light engine according to aspect 9, wherein the optical device includes one or more light emitting diodes coupled to a substrate.

[0078] Aspect 14. The light engine according to aspect 10, wherein each of the four separate mounting regions includes a slot opening.

[0079] Aspect 15. An illumination system defining a central axis, the illumination system comprising:

[0080] A driver compartment assembly;

[0081] A heat sink adapter housing fixed to the driver compartment;

[0082] A light engine adapted to be removably attached to the heat sink adapter housing, the light engine comprising:

[0083] A bottom plate;

[0084] An optical device coupled to the bottom plate;

[0085] A retaining ring removably mounted to the bottom plate;

[0086] A lens having an outer flange disposed between the bottom plate and the retaining ring, the lens at least partially surrounding the optical device to encapsulate the optical device on the bottom plate;

[0087] At least one mounting region having at least eight discrete openings separated from the central axis by no more than 10 degrees, the at least one mounting region being defined by one of the retaining ring and the heat sink adapter housing; and

[0088] At least one opening defined by one of the retaining ring and the heat sink adapter housing, the at least one opening having internal threads and corresponding to the at least one mounting area;

[0089] Wherein the retaining ring is rotatable relative to the heat sink adapter housing about the central axis, the retaining ring is rotatable in discrete increments via the at least eight discrete openings, the at least eight discrete openings of the at least one mounting area corresponding to the at least one opening, wherein the optical device rotates with the retaining ring to change the illumination direction of the light distribution emitted by the optical device.

[0090] Aspect 16. The lighting system according to aspect 15, wherein the retaining ring is adhesively mounted to the base plate.

[0091] Aspect 17. The lighting system according to aspect 15, wherein the retaining ring is fixed to the base plate via a fastener.

[0092] Aspect 18. The lighting system according to aspect 15, wherein the optical device includes one or more light emitting diodes coupled to a substrate.

[0093] Aspect 19. The lighting system according to aspect 15, wherein the light engine includes four mounting areas, each of the four mounting areas corresponding to a circumferential flange segment.

[0094] Aspect 20. The lighting system according to aspect 19, wherein the circumferential flange segments are separated by protrusions.

[0095] Without departing from the scope and spirit of the present disclosure, various modifications and variations of the present disclosure will become apparent to those skilled in the art, and it should be understood that the scope of the invention of the present disclosure should not be unduly limited to the exemplary embodiments set forth herein.

Claims

1. A lighting system, comprising: a driver compartment assembly; a heat sink adapter housing fixed to the driver compartment assembly, the heat sink adapter housing defining a plurality of openings, each of the plurality of openings having an internal thread; a light engine adapted to be removably attached to the heat sink adapter housing, the light engine comprising: a base plate; an optical device coupled to the base plate; a retaining ring removably mounted to the base plate, the retaining ring including a plurality of mounting regions circumferentially positioned therearound, wherein each of the plurality of mounting regions includes a plurality of discrete openings equidistantly spaced in a bow-shaped array, each of the plurality of mounting regions corresponding to a circumferential flange segment of the retaining ring, the circumferential flange segments of the retaining ring being separated by protrusions, the plurality of discrete openings being respectively defined as passing through the circumferential flange segments; and a lens having an outer flange disposed between the base plate and the retaining ring, the lens at least partially surrounding the optical device to encapsulate the optical device on the base plate; wherein the retaining ring is capable of rotating relative to the heat sink adapter in discrete increments via the plurality of discrete openings, each of the plurality of discrete openings of the plurality of mounting regions respectively corresponding to one of the plurality of openings of the heat sink adapter, wherein the optical device rotates with the retaining ring to change the light distribution illumination direction emitted by the optical device.

2. The lighting system according to claim 1, wherein the optical device comprises one or more light emitting diodes coupled to a substrate.

3. The lighting system according to claim 1, wherein the plurality of discrete openings are spaced no more than 8 degrees relative to the central axis of the lighting system.

4. The lighting system according to claim 1, wherein the plurality of discrete openings are spaced no more than 10 degrees relative to the central axis of the lighting system.

5. The lighting system according to claim 1, wherein the optical device comprises an IESNA Type I beam pattern.

6. The lighting system according to claim 1, wherein the optical device comprises an IESNA Type III beam pattern.

7. The lighting system according to claim 1, wherein the plurality of mounting regions allow the retaining ring to be adjustably rotated at least 180 degrees to change the light distribution illumination direction of the optical device.

8. The lighting system according to claim 1, wherein the plurality of discrete openings include at least eight discrete openings in the mounting regions.

9. A light engine, comprising: a base plate; an optical device coupled to the base plate; a retaining ring adhesively attached to the base plate; a heat sink adapter housing removably mounted to the retaining ring; and a lens having an outer flange disposed between the base plate and the retaining ring, the lens at least partially surrounding the optical device to encapsulate the optical device on the base plate; wherein the retaining ring and the optical device are configured to rotate together relative to the heat sink adapter housing to change the light distribution illumination direction emitted by the optical device.

10. The optical engine according to claim 9, wherein the retaining ring includes four separate mounting regions circumferentially positioned therearound, each of the four separate mounting regions corresponding to a circumferential flange segment of the retaining ring, the circumferential flange segments of the retaining ring being separated by protrusions.

11. The optical engine according to claim 10, wherein each of the four separate mounting regions includes at least five discrete openings.

12. The optical engine according to claim 10, wherein each of the four separate mounting regions includes at least eight discrete openings.

13. The optical engine according to claim 9, wherein the optical device includes one or more light emitting diodes coupled to a substrate.

14. The optical engine according to claim 10, wherein each of the four separate mounting regions includes a slot opening.

15. A lighting system defining a central axis, the lighting system comprising: a driver compartment assembly; a heat sink adapter housing fixed to the driver compartment; an optical engine adapted to be removably attached to the heat sink adapter housing, the optical engine including: a base plate; an optical device coupled to the base plate; a retaining ring removably mounted to the base plate; a lens having an outer flange disposed between the base plate and the retaining ring, the lens at least partially surrounding the optical device to encapsulate the optical device on the base plate; at least one mounting region having at least eight discrete openings separated from each other by no more than 10 degrees with respect to the central axis, the at least one mounting region being defined by one of the retaining ring and the heat sink adapter housing; and at least one opening defined by the other of the retaining ring and the heat sink adapter housing, the at least one opening having an internal thread and corresponding to the at least one mounting region; wherein the retaining ring is rotatable about the central axis relative to the heat sink adapter housing, the retaining ring being rotatable in discrete increments via the at least eight discrete openings, the at least eight discrete openings of the at least one mounting region corresponding to the at least one opening, wherein the optical device rotates with the retaining ring to change the illumination direction of the light distribution emitted by the optical device.

16. The lighting system according to claim 15, wherein the retaining ring is adhesively mounted to the base plate.

17. The lighting system according to claim 15, wherein the retaining ring is fixed to the base plate via fasteners.

18. The lighting system according to claim 15, wherein the optical device includes one or more light emitting diodes coupled to a substrate.

19. The lighting system according to claim 15, wherein the optical engine includes four mounting regions, each of the four mounting regions corresponding to a circumferential flange segment.

20. The lighting system according to claim 19, wherein the circumferential flange segments are separated by protrusions.

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