Patent Publication Number: US-10330306-B2

Title: Underwater light

Description:
TECHNICAL FIELD 
     The embodiments disclosed herein relate to under water lighting, and, in particular to systems, methods, and apparatus for underwater lighting. 
     INTRODUCTION 
     Water within a swimming pool may be illuminated by an incandescent light that is housed within a watertight fixture that is situated within a cavity in one end of a pool wall, or a niche in a wall of the pool, below a waterline. The cavity, or niche, is required in the wall of the pool because the incandescent light has a longitudinal length wherein the niche is needed to place the bulb so that it does not extend into the pool. The watertight fixture has an outer lens that may protrude slightly into the pool. When a new bulb is needed, the whole fixture is removed from the cavity. A power cable supplying electricity to the light is long enough for the fixture to be safely positioned out of the pool water. 
     Typically, a clear incandescent light bulb is placed in the fixture. If a colored effect is desired, such as blue, red, or green, then a different color bulb is placed in the fixture. In another embodiment, the outer lens is replaced with a colored lens, or a colored lens cover fits over the clear lens. However, in each of these situations, an individual has to manually make a modification to the pool light to produce a desired color. If the individual wanted to continuously vary the colors where the intensity of the light is not lessened, such an option is not available. 
     Standard electrical wiring connects the watertight fixture to a 110-voltage source. Nonetheless, providing a 110-volt electricity source to such fixtures presents an element of risk that many would prefer to avoid. Also, such incandescent lamp fixtures frequently expose the imperfections in the interior surface of the swimming pool as a consequence of the lamps diffusion of light and the intensity of the light source. 
     Light emitting diode (LED) lighting assemblies for swimming pools are frequently designed specifically for aboveground pools and hot tubs. Typically, such assemblies will employ a combination of red, green and blue LED arrays, which permits the generation of up to 256,000 colors. 
     For example, U.S. Pat. No. 6,184,628 (“the &#39;628 patent”) appears to teach the use of predetermined arrays of a plurality of different colored LED bulbs to replace an incandescent pool light where the plurality of different colored LED bulbs are wired in such a manner that the predetermined arrays of plurality of different colored LED bulbs activate at predetermined sequences for predetermined time intervals wherein the bulbs are encased in a lens. Even though LED bulbs are used, providing LED lighting fixtures with brightness to rival incandescent bulbs is still an issue, especially when not all of the LED bulbs are illuminated. 
     U.S. Pat. No. 7,410,268 describes a control circuit having a hard wired switch which when activated a defined number of times produces a plurality of light colors and/or light patterns wherein each of the plurality of light colors and/or light patterns are selected based on the defined number of times the switch is activated. 
     It may be desirable to remotely and wirelessly control the light without signal interference from the water. Accordingly, it may be desirable to provide an improved underwater light 
     SUMMARY 
     According to some embodiments, there is an underwater lighting assembly comprising a mounting plate for attaching to an underwater surface of a container for holding a body of water, at least one light source for providing light, a controller electrically connected to the at least one light source, the controller being configured to control the at least one light source, a housing for providing a watertight seal to enclose the at least one light source and the controller, the housing being attachable to the mounting plate, and a signal wire for receiving remote control signals, the signal wire being electrically connected to the controller and configured to extend from the controller to an area outside of the body of water. 
     The underwater lighting may further include a light plate for supporting the light source, wherein the light source is spaced from the light plate. 
     The underwater lighting may further include a controller board mounted to the housing, wherein the controller is mounted to the controller board. 
     The underwater lighting may further include an encapsulating layer for encapsulation light plate and the controller board. 
     The light plate may be spaced apart by a distance D from the controller board, wherein the distance D is selected to provide heat dissipation through the encapsulating layer between the light plate and the controller board. The distance D may be between 0.25 and 0.75 inches. 
     The at least one light source may be a plurality of light emitting diodes (LEDs). The LEDs may be low power and low voltage. The LEDs may be any one or more of blue, red, or green LEDs. 
     The underwater lighting may further include an adapter ring for mounting between the mounting plate and the underwater surface. 
     According to some embodiments, there is a system for underwater lighting including an underwater lighting assembly and a remote control for remotely controlling the controller. The underwater lighting assembly including a mounting plate for attaching to an underwater surface of a container for holding a body of water, at least one light source for providing light, a controller electrically connected to the at least one light source, the controller being configured to control the at least one light source, a housing for providing a watertight seal to enclose the at least one light source and the controller, the housing being attachable to the mounting plate, and a signal wire for receiving remote control signals, the signal wire being electrically connected to the controller and configured to extend from the controller to an area outside of the body of water. 
     The system may further include a transformer electrically connected to the underwater light assembly and a power source, wherein the transformer reduces voltage and power provided to the underwater lighting assembly. 
     The remote control may include a plurality of buttons for selecting the lighting of the underwater lights. 
     According to some embodiments, there is a method for installing underwater lighting. The method includes removing water from a body of water to below a desired mounting water level, drilling an electrical conduit in a surface of the body of water, mounting a mounting plate to the surface of the body of water proximate to the electrical conduit, pulling an electrical cable including a signal wire through the electrical conduit to a junction box, and attaching a underwater lighting assembly to the wall bracket. 
     The method may further include controlling the underwater light with a remote control. 
     The method may further include affixing an adapter ring between the mounting plate and the surface off the body of water. 
     The method may further include wrapping the electrical cable around a rear surface of the underwater lighting assembly. 
     The method may further include installing a low voltage transformer in the junction box at a distance from an edge of the body of water. 
     The method may further include securing a junction box cover over the junction box. 
     The method may further include mounting the mounting plate to the surface of the body of water having a radius of more than 6 feet. 
     Other aspects and features will become apparent, to those ordinarily skilled in the art, upon review of the following description of some exemplary embodiments. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The drawings included herewith are for illustrating various examples of articles, methods, and apparatuses of the present specification. In the drawings: 
         FIG. 1  is a perspective view of an underwater light assembly, in accordance with an embodiment; 
         FIG. 2A  is a top view of the underwater light assembly of  FIG. 1 ; 
         FIG. 2B  is a front view of the underwater light assembly of  FIG. 1 ; 
         FIG. 3  is a rear view of the underwater light assembly of  FIG. 1 ; 
         FIG. 4  is an exploded view of the underwater light assembly of  FIG. 1 ; 
         FIG. 5  is a sectional view, with certain components removed for clarity and certain components shown schematically, of the underwater light assembly along  5 - 5  of  FIG. 2B ; 
         FIGS. 6A and 6B  are side installation views of the underwater light assembly of  FIG. 1 , in a concrete and liner pool; 
         FIG. 7A  is a top view of a mounted underwater light assembly, in accordance with an embodiment; 
         FIG. 7B  is a rear view of the underwater light assembly of  FIG. 1 ; 
         FIG. 7C  is a rear view of a mounting plate, of the underwater light assembly of  FIG. 1 ; 
         FIG. 7D  is a front view of a mounting plate and an adapter ring of the underwater light assembly of  FIG. 1 ; 
         FIG. 7E  is a side view of an installation of the underwater light assembly of  FIG. 1 ; 
         FIGS. 8A and 8B  are front and rear views, respectively, of a mounting plate of the underwater light assembly of  FIG. 1 ; 
         FIG. 8C  is a front view of a mounting washer, in accordance with an embodiment; 
         FIGS. 9A and 9B  are front and rear views, respectively, of an adapter ring of the underwater light assembly of  FIG. 1 ; 
         FIG. 10  is a flow chart of a method for installing an underwater light assembly, in accordance with an embodiment; and 
         FIG. 11  is a circuit diagram of an underwater light assembly, in accordance with a further embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     Various apparatuses or processes will be described below to provide an example of each claimed embodiment. No embodiment described below limits any claimed embodiment and any claimed embodiment may cover processes or apparatuses that differ from those described below. The claimed embodiments are not limited to apparatuses or processes having all of the features of any one apparatus or process described below or to features common to multiple or all of the apparatuses described below. 
     Referring to  FIGS. 1 to 5 , illustrated therein is an underwater light assembly  100 , in accordance with an embodiment. The underwater light assembly  100  attaches to an underwater surface of a container for holding a body of water. The container may be natural occurring such as a lake or pond bottom. The container may be man-made such as a concrete pool, a fiberglass pool, or a steel pool with a vinyl liner, or the like. The underwater surface of a body of water such as a wall or floor of a body of water. The underwater light assembly  100  is waterproof and may be immersed in liquid, such as saltwater, chlorinated water, and freshwater. The body of water may be a pool, a pond, a lake, or the like. In particular, the body of water may be a chlorinated or saltwater swimming pool, a freshwater or saltwater water feature, a large freshwater or marine aquarium, an underwater cave, a grotto, or a lagoon, under dock lighting in freshwater saltwater underwater safety lighting for marinas, or underwater shore lighting in freshwater or saltwater. 
     The underwater light assembly  100  includes at least one light source  102  for providing light. In certain cases, the at least one light source  102  is a plurality of light emitting diodes (LEDs). The LEDs may be of low power and low voltage (e.g., 12 V) and alternating current (54 watts). In the embodiment shown, the underwater light assembly  100  includes 18 LEDs  102  at 3 watts each for a total of 54 watts. 
     The LEDs may be more energy efficient than regular underwater lights. This LEDs may have improved electrical efficiency (e.g., 75%). The low power and low voltage LEDs may reduce the chance of electric shock. The light sources  102  may provide an angle of dispersion of about 45 degrees so that light is directed through a lens  110  to shine light towards the surface of the water. The light sources  102  may be configured, in contrast to conventional LEDs which usually provide angle of dispersion of 10 to 15 degrees. 
     The light sources  102  may provide different colors. For example the light sources may be any one or more of blue, red, or green LEDs. The light sources  102 , in combination, may be triggered to provide any of purple, aqua, yellow, and white. The light sources  102  may also provide a variety of different color combinations and light show programs. 
     The underwater light assembly  100  includes a housing  104  for providing a watertight seal to enclose the light sources  102 . The housing  104  includes a housing body  106 , a housing cover  108 , and the lens  110 . The housing  104  may be made of corrosion free materials that will not break if bumped during underwater play or if struck by pool toys. The housing  104  may not have any glass components to reduce the possibility of dangerous shards that could cut pond or pool liners. The housing  104  may be made of strong, durable polymer plastics. The housing  104  may include a set of tabs  105  for holding excess cable that is wrapped around the housing  104 . The lens  110  may include a ultraviolet protective layer to inhibit the lens  110  from yellowing when the sun penetrates the lens  110 . 
     The at least one light source  102  attaches to the light plate  112 . The light source  102  may be spaced (e.g., ⅜″) from the light plate  112 , to dissipate heat through the air. Each light source  102  may be encapsulated by an individual lens  117 . The light sources  102  are electrically connected to a controller  109  mounted on a controller board  113  ( FIG. 5 ). The controller board  113  is mounted to the housing  106 . The controller  109 , or control circuitry, controls the at least one light source  102 . The controller  109  determines what light sources  102  to trigger on and off and converts electrical signals into light commands. The light plate  112 , controller  109 , and controller board  113  are encapsulated by an encapsulating layer  115 . The encapsulating layer  115  may be a silicone material that is provided to give a water tight seal to the controller  109 , the controller board  113 , and the light plate  112 . The light plate  112  may be spaced apart by a distance D from the controller board  113 . The distance D is such that there is heat dissipation through the encapsulating layer  115  between the light plate  112  and the controller board  113 . The distance D may be about 0.25 inches to 0.75 inches, and more particularly about 0.5 inches. 
     The lens  110  may be made of high clarity, shatter resistant polymer plastics. The lens  110  may be made of plastic, such that if a crack is formed, the lens  110  does not break. The lens  110  may include light refracting prisms  111  to optimize lighting effectiveness. The light refracting prisms  111  facilitate light retention in the water to create an optically pleasing ambience. 
     The underwater light assembly  100  includes a mounting plate  116  for mounting the housing  108  to the underwater surface of the container. The mounting plate  116  may be used for new installations as well as a retrofit for an existing pools. For niche installations, the mounting plate  116  attaches to an optional adapter ring  114 , and the adapter ring  114  is mounted to the underwater surface of the container. 
     The underwater light assembly  100  includes a light plate  112 . The light plate  112  attaches the at least one light source  102  to the housing body  106 . The light plate  112  is made of a material that supports the light sources  102 . The light plate  112  may include conductive elements and pathways to provide electrical conductivity selectively to each of the light sources (see, for example  FIG. 11 ). The light plate  112  is spaced apart from a back surface of the underwater light assembly  100  such that there is a dissipation for any heat created by the light sources  102 . The spacing provides spacing such that the light sources  102  do not overheat or cause damage to the underwater light assembly  100 , while the light sources  102  are lit. 
     The underwater light assembly  100  includes a face cover  120  that attaches the lens  110  to the housing cover  108 . The face cover  120  may attach the lens  110  to the housing cover, for example using tabs  121  or a snap fitting. The face cover  120  may be removable to provide access to the light sources  102  so that the light sources can be replaced, if burnt out. The housing cover  108  may include slots  119  there through. The slots  119  may provide water circulation and ventilation to prevent buildup of algae and water debris. The housing cover  108  may have smooth edges that are angled to the wall surface such that pool cleaners are able to navigate over the surface of the housing  108 . 
     The underwater light assembly  100  includes a lens seal  122  for sealing the lens  110  to the housing cover  108 . The lens seal  122  may provide a substantially watertight seal to the lens and housing cover  108  such that the area inside the lens  110  and adjacent the light sources  102  is sealed off from the exterior of the underwater light assembly  100  particularly when the underwater light assembly  100  is submerged in the body of water. The lens seal  122  may be made from a soft and flexible material that can conform to the surfaces of the lens  110  and the housing cover  108 . The lens seal  122  may be compressed and sandwiched between the lens  110  and the housing cover  108  to inhibit the passage of water into the light source  102  compartment. As heat is dissipated from the encapsulating layer  115 , the lens seal  122  may be provided with a softer material, as heat expansion may be reduced. The lens seal  122  may be integrally formed with the encapsulating layer  115 . 
     The underwater light assembly  100  includes an electrical cable  124 , which at a first end, attaches to electrical terminals  126  of the controller  109  and onto the light sources  102 . An opposite, second end of the electrical cable  124  may connect to a power source  128 . The power source  128  may be, for example, a removable source of energy, such as a battery, or the power source  128  may be a transformer connecting to the electrical grid. The power source  128  provides power to the light sources  102 . 
     The underwater light assembly  100  includes cable jacket having a signal wire  118  for receiving remote control signals to control the light sources  102 . The signal wire  118  is connected to the controller  109  and is configured to pass from the underwater surface of the container to an area outside of the underwater surface, such as a land area on or near the deck surface. The signal wire  118  may pass with the electrical cable  124 . The signal wire  118  is electrically connected to the light sources  102  at one end, and passes through the pool deck and to the deck surface. The signal wire  118  communicates with the remote control  154  to communicate activation instructions to the light sources  102 . The signal wire  118  may provide improved communication with the remote control, for example, of at least 45 feet from the underwater light assembly  100 . 
     The underwater light assembly  100  includes a sealing o-ring  130  for sealing the electrical cable  124  to the housing body  106 . The sealing o-ring  130  may provide for a watertight seal into the housing body  106  such that water is inhibited from entering the underwater light assembly  100 . The sealing o-ring  130  passes around an outer surface of the electrical cable  124  and into an aperture of the housing body  106 . 
     Turning now to  FIGS. 6A and 6B , illustrated therein is a system  150  for underwater lighting, in accordance with an embodiment. The system  150  includes a underwater light assembly, for example, the underwater light assembly  100  as described with reference to  FIGS. 1 to 5 . 
     The underwater light assembly  100  is electrically connected to a junction box  151 . The junction box may be a low voltage transformer connected to a power source that reduces voltage and power (e.g., reducing 110 V to 12 V). The junction box  151  may accommodate one or more light assemblies. The junction box  151  may be positioned at a minimum distance A from the side  161  of the pool and the location of the underwater light assembly  100 . In particular, the distance A may be a minimum 120 cm (4 ft.) from edge of pool to reduce the chance of electric shock. Low power components of the light assembly and shock-protected metal parts are within a certain proximity to the pool to reduce electrical shock. 
     The system  150  includes a signal receiver  152  at the end of the signal wire ( 118 ) extending from the underwater light assembly  100  for receiving signals from a remote control  154 . The signal wire  118  may pass from the underwater light assembly  100  and through a pool conduit  160  in the side  161  of the pool. The signal receiver  152  may be below a pool deck  162  of the pool deck (as illustrated at  FIG. 6A ) or at the top surface of the pool deck (as illustrated in  FIG. 6B ). The signal receiver  152  may connect with the signal wire  118  of the underwater light assembly  100  to provide control instructions to the underwater light assembly  100 . 
     The pool conduit  160  may be a drilled through hole leading from the location of the underwater light assembly  100 , through the pool wall surface, and pass at an angle up to the signal receiver  152 . In a particular embodiment, for improved signal range, the signal receiver  152  extends above the ground, as illustrated at  FIG. 6B . 
     The underwater light assembly  100  may be provided at a distance B below the surface of the water, and at a distance C below the top  162  of the pool deck  164 . The location of the underwater light assembly  100  may be such that the light assembly is submerged below the water level of the pool. The distance B may be greater than 45 cm or 1.5 feet and up to 20 feet. The distance B may be such that the light generated from the light assembly is visible from the surface of the water. 
     As seen from  FIG. 6A , the underwater light assembly  100  may be affixed directly to the wall  161  of the pool. As seen from  FIG. 6B , the underwater light assembly  100  may be affixed over a pool liner  163  and a pool panel  165 . Where the underwater light assembly  100  is affixed directly to the pool wall  161  of the pool, the wall of the pool may include a recess  168 . The recess  168  provides a location for some of the components of the underwater light assembly  100  such as the electrical cable  124 . The recess  168  may be cut back around the underwater light assembly  100  to allow for a compact seal. 
     The system  150  includes the remote control  154  for remotely controlling the power provided to the light sources  102 . The remote control  154  communicates with the signal receiver  152  located at the surface of the pool deck  162 . Advantageously, the remote control  154  need not communicate through water, as water may distort or disrupt certain control frequencies. 
     Where the underwater light assembly  100  includes light sources that may have different colors, the remote control controls the color of the illuminated light sources  102 . The remote control  154  includes a plurality of buttons  156  for selecting various lighting options for the lighting of the light source  102 . For example, the remote control  154  may include different settings to select colors and color cycle modes. The remote control  154  may be a purpose built device or may be, for example, a mobile device such as a smart phone, with a variety of functions. 
     The remote control  154  may include buttons  156  for any one or more of activation, on, off, or a particular color or a particular sequence of colours. In an embodiment, the underwater light assembly  100  is operable to produce a plurality of individual colors, including any one or more of blue, red, green, purple, aqua, yellow, and white, that are selected using the remote control  154 . The underwater light assembly  100  may be operable to perform a plurality of different color cycles, including, for example, any one or more of red-yellow-green, green-aqua-blue, red-purple-blue, red-green-blue, green-purple-blue-red-white-aqua-yellow, or a gradual change of all colors. In some cases, the user may be able to program a particular desired color sequence into the underwater light assembly  100 . 
     In certain embodiments, the underwater light assembly  100  may include a memory on the controller board ( 113 ) that will save the color cycle mode that was last set. When the underwater light assembly  100  is turned back on, the color cycle mode that was last set will be initiated. 
     Turning now to  FIG. 7A , illustrated therein are mounting examples  170 ,  172 ,  174 ,  176 , in accordance with an embodiment. 
     At  170 , the underwater light assembly  100  may not be mounted to walls having a reverse radius surface  171 . At  172 , the underwater light assembly  100  may not be mounted to walls having a particularly uneven surface  173 . The underwater light assembly  100  may not be mountable to these surfaces  171 ,  173 , or may be more easily damaged when the underwater light assembly  100  is struck. 
     The underwater light assembly  100  may be mounted to a wall having a flat surface  175 , or a wall surface  177  with a radius of no less than 6 feet as viewed from the pool surface. The underwater light assembly  100  may be mounted to these surfaces  175 ,  177  to provide a stable and watertight surface between the underwater light assembly  100  and the wall surface  175 ,  177 . 
       FIG. 7B  illustrates the location of the pool conduit  160  with respect to the back of the underwater light assembly  100  (where the adapter ring  114  is not used). The pool conduit  160  is located proximal and adjacent the back of the underwater light assembly  100  and within the radius of the housing cover  108 .  FIG. 7C  illustrates a wall view of the location of the pool conduit  160  and relative to the housing cover  108 . The mounting plate  116  (shown schematically) is mounted directly to the wall. The pool conduit  160  is located to ensure that the underwater light assembly  100  will cover the pool conduit  160  and be within the radius  180  of the adapter ring  114 . The mounting plate  116  is mounted directly to the wall with fasteners passing through wall-mount apertures  187  and into the wall. The wall-mount apertures  187  may include a grommet for providing a watertight seal. 
       FIG. 7D  illustrates the adapter ring  114  for niche installations (e.g.,  FIG. 6A ) where there is a recess in the pool wall. The mounting plate  116  is fastened to the adapter ring  114 . In particular the mounting plate  116  is mounted to the back plate via fasteners  182  and through mounting apertures  184  in the mounting plate  116 . For example the fasteners  182  may be screws or bolts or the like. 
       FIG. 7E  illustrates the attachment of the light assembly housing to the mounting plate. In an open position, at  190 , the mounting screw is removed and the housing tab is lifted up and out  186  of the slot in the mounting plate that is attached to the adapter ring  114 , in an outward and upward motion. In a lock position, at  192 , the housing body  108  is inserted into the slot in the mounting plate  186  that is attached to the adapter ring  114 , in an inward and downward motion. 
       FIGS. 8A and 8B  illustrate a front and rear view, respectively, of the mounting plate  116 , in accordance with an embodiment. The mounting plate  116  includes mounting apertures  184  for fastening, with fasteners  182  ( FIG. 7D ), to the adapter ring  114 . ( FIG. 7D ) The mounting plate  116  includes wall-mount apertures  187  for attaching directly to the wall, for where no adapter ring  114  is used. The mounting plate  116  may be a universal bracket having a plurality of mounting holes  187  to be selected to mount to a particular set of pre-existing mounting holes in the wall. 
     The mounting plate  116  include the housing slot  186  positioned at a bottom end  188  of the mounting plate  116 . As seen from  FIG. 4 , the housing body  100  includes a mounting tab  199  for mating with the housing slot  186  ( FIG. 8B ) of the mounting plate  116 . Once the mounting tab  199  is inserted into the mounting plate slot  186  of the mounting plate  116  the housing  106  is attached to the mounting plate with a fastener  123 . 
       FIG. 8C  illustrates a mounting washer  400 , in accordance with an embodiment. The mounting washer  400  mates between the mounting plate  116  and the adapter ring  114  for particular retrofit mounting applications. The mounting washer  400  provides additional thickness (e.g., ⅛″ thick) to fit certain conventional fittings. The mounting washer  400  has a plurality of apertures  402  that correspond to the mating holes  187  of the mounting plate  116 . 
       FIGS. 9A and 9B  illustrate a front and rear view, respectively, of the adapter ring  114 , in accordance with an embodiment. The adapter ring  114  includes mounting apertures  185  for receiving fasteners  182  ( FIG. 7D ) to attach to the mounting plate  116 . The adapter ring  114  includes a cutout  194  for the signal wire  118  to pass through. The adapter ring  114  also includes a plurality of wall mounting apertures  196  (e.g., slots) for providing attachment to existing light features. The adapter ring  114  also includes a securing aperture  198  for receiving a fastener to fasten the housing body  106  securely to the adapter ring  114 . The adapter ring  114  has a depth to space the underwater light assembly  100  a distance from the pool wall. 
     Turning now to  FIG. 10 , illustrated therein is a method  200  for installing underwater lighting, in accordance with an embodiment. The method  200  may be performed by a qualified electrician to ensure that the electrical system and wiring conform to local electrical codes. 
     At  202 , water is removed from the pool or body of water to below the desired mounting location between 1.5 and 20 feet. At  204 , an electrical conduit path is drilled in a surface of the pool. The electrical conduit path is for the electrical cord which provides power to the light assembly and includes a signal wire for controlling the light assembly. 
     At  206 , the adapter ring is mounted to the surface of the pool proximate to the electrical conduit path. The wall bracket may not be mounted to a wall with radius of less than 6 feet (as described with reference to  FIG. 7A ). The mounting bracket is installed to ensure that the top edge of the light lens may be a minimum of 45 cm (1.5 ft.) below the water surface. The electrical conduit may be located 2.5″ to the left and 1″ below the center position of where light is to be installed. 
     Where the pool is a liner pool, a drill hole is drilled in the pool panel to the size of the electrical cord and the conduit is installed to protrude through pool panel. Excess electrical conduit may be trimmed after backfilling and prior to liner installation. Once backfilling is complete, prior to liner installation, the conduit is trimmed to be about flush with pool panel. 
     At  208 , the electrical cord including the signal wire is passed through the electrical conduit path to the junction box. At  210  the mounting plate is affixed to the adapter ring. 
     For non-niche mounting, the mounting plate is mounted directly to the pool and the light housing covers the conduit hole. The back of the mounting plate is flush with the surface of the finished pool wall. For plastered pools, concrete cutback is provided for plaster thickness. For finished concrete, the surface is flush with the front surface of the mounting plate. Once the pool surface is finished, the electrical cord is inserted into the conduit hole and the electrical cord is pulled through to the junction box. Slack electrical cord may be provided at the light assembly for servicing. 
     A length of the electrical cord may be wrapped around the back of the light assembly, and held by tabs  105  (shown at  FIGS. 3 and 4 ). This extra length (e.g., to a maximum of 2.4 m (8 ft.) long) allows for the light to be brought out of the pool for re-lamping and servicing. For liner pools, waterproof silicon may be applied around the electrical cord at the liner to seal the electrical cord to the pool liner. 
     Optionally, for niche installations, the adapter ring is used. The adapter ring is fastened to the wall (existing niche) through the slots. The mounting plate is then mounted to the adapter ring. 
     The ring tab near the inside bottom of light is inserted into slot in bottom of mounting plate. The housing is fastened to the mounting plate for example, with a screw passing through a hole in the top of the mounting plate where the light assembly is in a vertical position to slip the tab into the slot. 
     At  212 , the low voltage transformer junction box is optionally installed at a distance from the edge of the pool. At  214 , the electrical cord is connected to the junction box. At  216 , a junction box cover is secured over the junction box. At  218 , the pool is filled with water until the underwater light is submerged before the light is operated. The light is operated at  220 . At  222 , the underwater light is controlled with the remote control. 
       FIG. 11  illustrates a circuit diagram  300  for a back plate (e.g., light plate  112  of  FIG. 5 ), in accordance with an embodiment. The light may include an AC12V input and having a power of 54 W. The circuitry  302  may connect 18 LED lights  304 , having RGB colors and 3 W. 
     While the above description provides examples of one or more apparatus, methods, or systems, it will be appreciated that other apparatus, methods, or systems may be within the scope of the claims as interpreted by one of skill in the art.