Patent Publication Number: US-11383181-B2

Title: Systems and method for a coolant chamber

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application claims priority to and the benefit of U.S. Provisional Patent Application No. 62/965,693, entitled “Debubbler Systems and Methods for Cooling Devices,” filed Jan. 24, 2020, which is hereby incorporated by reference in its entirety for all purposes. 
    
    
     BACKGROUND 
     The present disclosure relates generally to a coolant chamber for a cooling apparatus. In particular, the present disclosure relates to systems and methods for reducing gas bubbles, managing fluid thermal expansion, and venting and pressure compensation in cooling systems for light emitting diode (LED) lighting instruments or other lighting instruments. 
     This section is intended to introduce the reader to various aspects of art that may be related to various aspects of the present techniques, which are described and/or claimed below. This discussion is believed to be helpful in providing the reader with background information to facilitate a better understanding of the various aspects of the present disclosure. Accordingly, it should be understood that these statements are to be read in this light, and not as admissions of prior art. 
     Generally, LED lighting instruments may provide lighting for a variety of applications. In some applications, high intensity lighting from LED lighting instruments may be enhance lighting and visibility in certain areas. For example, LED lighting instruments may provide high intensity lighting for motion picture and television sets and studios. To provide such high intensity lighting (e.g., lighting consuming 500 W-1500 W of total power), an arrangement of LEDs within the lighting instruments may be relatively dense and numerous. As the density of LEDs in a given space increase, an amount of heat produced by the LEDs and a temperature of the LEDs may generally increase. Typical Wall Plug Efficiency (“WPE”) of blue LEDs used to make white light may be about 50% such that about 50% of the energy will be converted into photons and the other 50% will be lost as heat. There may be an additional loss when the light is converted from blue light to white by the phosphors. In these cases, about half of the electrical power provided to LEDs is converted into heat. As such, it should be appreciated that efficient cooling systems for LED systems may enhance performance, longevity, and efficiency of the LED systems. 
     Conventional cooling techniques for lighting systems may not sufficiently cool such high intensity LED lighting instruments. Additionally, Chip Scale Packaging (“CSP”) technology and Chip on Board (“COB”) arrays provide the ability to directly attach LED die to a printed circuit board (“PCB”) without a package. Typical LED die may be about 1 millimeter (mm) in size (e.g., a length of the die) or less. The LED die are packaged separately, which makes them easier to handle in manufacturing and increases the available area for dissipating heat (e.g., 3 mm×3 mm is a common package for example). In COB and/or CSP technology, an array of LED dies may be attached directly to a high-resolution PCB which may increase the power density. LED arrays with power densities of 80 watts per square inch and higher are produced today with these CSP and COB technologies with higher power densities constantly being developed. LEDs may typically be maintained at a junction temperature of less than 125 degrees Celsius or they will be damaged. Due to the heat restrictions, the packing density of LEDs in system designs may be effectively limited by heat. However, traditional air-cooling techniques, such as heat sinks, may not sufficiently cool the LED lighting instruments. Even adding fans to increase airflow over metal heat sinks provides limited heat dissipation. 
     Furthermore, cooling techniques employing cooling fluid may operate in suboptimal manners. For example, as cooling fluid facilitates heat dissipation of the LED lighting instrument, the cooling fluid may be subject to different temperatures, which may decrease and/or increase the pressure of the cooling fluid in constant volumes. The fluctuation in pressure may create bubbles in coolant fluid flow paths, thereby affecting the efficiency of the cooling technique. Accordingly, there is a need to improve the lighting instrument cooling by reducing bubbles in the coolant fluid flow paths, the implementation of which may be difficult to develop and coordinate in various systems generating high temperatures. 
     BRIEF DESCRIPTION 
     Although the following description describes cooling systems used in an LED assembly, the cooling systems may be deployed in other systems, such as electronic systems. Debubbler systems and methods disclosed herein may reduce bubbles in coolant flow paths associated with light cooling systems of the LED assembly. The light cooling systems include a coolant fluid configured to flow over the LED assembly along a coolant flow path to cool LEDs emitting light and to remove heat produced by the LEDs. A pump of the cooling system may circulate the coolant fluid along the coolant flow path between the LED assembly, a heat exchanger that removes the heat from the coolant fluid, and a debubbler system. A debubbler system may include a hollow enclosure that includes an inlet and an outlet to receive the coolant fluid via the coolant fluid flow path. The debubbler system further includes a check valve to exhaust air bubbles in the coolant fluid out of the hollow enclosure to reduce air bubbles in the coolant fluid. The check valve may be fluidly coupled to a vent tube, such that an opening of the vent tube is above the coolant fluid. The debubbler system may be part of a cooling system for cooling electronics systems, such as LED lighting systems. 
    
    
     
       DRAWINGS 
       These and other features, aspects, and advantages of the present disclosure will become better understood when the following detailed description is read with reference to the accompanying drawings in which like characters represent like parts throughout the drawings. 
         FIG. 1  is a perspective view of an embodiment of a lighting assembly having a light emitting diode (LED) assembly and a cooling system, in accordance with one or more current embodiments; 
         FIG. 2  is a schematic diagram of an embodiment of the cooling system of  FIG. 1  configured to immersively and actively cool the LED assembly of  FIG. 1 , in accordance with one or more current embodiments; 
         FIG. 3  is a cross-sectional view of the lighting assembly of  FIG. 1  having the cooling system and the LED assembly, in accordance with one or more current embodiments; 
         FIG. 4  is a perspective cross-sectional view of the lighting assembly of  FIG. 1  having the cooling system and the LED assembly, in accordance with one or more current embodiments; 
         FIG. 5  is a perspective view of the LED assembly of  FIG. 1 , in accordance with one or more current embodiments; 
         FIG. 6A  is a rear perspective view of the lighting assembly of  FIG. 1  having the cooling system and the LED assembly, in accordance with one or more current embodiments; 
         FIG. 6B  is a rear perspective view of another embodiment of a lighting assembly having the cooling system of  FIG. 1 , in accordance with one or more current embodiments; 
         FIG. 7  is a perspective view of another embodiment of the cooling system and the LED assembly of  FIG. 1  including a transparent enclosure, in accordance with one or more current embodiments; 
         FIG. 8  is a perspective cross-sectional view of the LED assembly and the transparent enclosure of  FIG. 7 , in accordance with one or more current embodiments; 
         FIG. 9  is a bottom perspective view of the LED assembly and the transparent enclosure of  FIG. 7 , in accordance with one or more current embodiments; 
         FIG. 10  is a partially exploded view of the LED assembly and the transparent enclosure of  FIG. 7 , in accordance with one or more current embodiments; 
         FIG. 11  is a side view of the cooling system of  FIG. 7  and a side view of an embodiment of a lighting assembly, in accordance with one or more current embodiments; 
         FIG. 12  includes side views of the cooling system of  FIG. 7 , in accordance with one or more current embodiments; 
         FIG. 13  includes perspective views of the cooling system of  FIG. 7  coupled to light directing assemblies, in accordance with one or more current embodiments; 
         FIG. 14  is a perspective cross-sectional view of another embodiment of a lighting assembly having the LED assembly and the cooling system of  FIG. 1 , in accordance with one or more current embodiments; 
         FIG. 15  is a perspective view of the lighting assembly of  FIG. 14 , in accordance with one or more current embodiments; 
         FIG. 16  is a flow diagram of an embodiment of a method for controlling the cooling system of  FIGS. 1-15 , in accordance with one or more current embodiments; 
         FIG. 17  is a cross-sectional view of the debubbler system of  FIG. 1 , in accordance with one or more current embodiments; 
         FIG. 18A  is a cross-sectional view of the debubbler system of  FIG. 1  in a first orientation having a weighted member at the bottom of the debubbler system of  FIG. 1 , in accordance with one or more current embodiments; 
         FIG. 18B  is a cross-sectional view of the debubbler system of  FIG. 1  in a second orientation having an inlet oriented opposite a direction of a gravity vector, in accordance with one or more current embodiments; 
         FIG. 18C  is a cross-sectional view of the debubbler system of  FIG. 1  in a third orientation, in which the outlet is positioned opposite a gravity vector, in accordance with one or more current embodiments; 
         FIG. 19  is a flow diagram of a first arrangement of the cooling system of  FIG. 1 , including the debubbler system of  FIG. 1 , in accordance with one or more current embodiments; 
         FIG. 20  is a flow diagram of a second arrangement of the cooling system of  FIG. 1 , including the debubbler system of  FIG. 1 , in accordance with one or more current embodiments; 
         FIG. 21  is a flow diagram of a third arrangement of the cooling system of  FIG. 1 , including the debubbler system of  FIG. 1 , in accordance with one or more current embodiments; 
         FIG. 22  is a schematic diagram of cooling system of  FIG. 1 , including the debubbler system of  FIG. 1 , in accordance with one or more current embodiments; 
         FIG. 23  is a perspective view of an inside of an enclosure of the debubbler system of  FIG. 1 , in accordance with one or more current embodiments; 
         FIG. 24  is a cross-section view of the debubbler system of  FIG. 1 , including a fluid level sensor, in accordance with one or more current embodiments; 
         FIG. 25  is a cross-section view of the debubbler system of  FIG. 1 , including the fluid level sensor of  FIG. 24 , in accordance with one or more current embodiments; 
         FIG. 26  is a cross-section view of the debubbler system of  FIG. 1 , including the fluid level sensor of  FIG. 24 , in accordance with one or more current embodiments; 
         FIG. 27A  is a schematic diagram of the lighting assembly of  FIG. 1  oriented in an upward position, in accordance with one or more current embodiments; 
         FIG. 27B  is a schematic diagram of the lighting assembly of  FIG. 1  oriented in a horizontal position, in accordance with one or more current embodiments; and 
         FIG. 27C  is a schematic diagram of the lighting assembly of  FIG. 1  oriented in a downward position, in accordance with one or more current embodiments. 
     
    
    
     DETAILED DESCRIPTION 
     One or more specific embodiments of the present disclosure will be described below. These described embodiments are only examples of the presently disclosed techniques. Additionally, in an effort to provide a concise description of these embodiments, all features of an actual implementation may not be described in the specification. It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers&#39; specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another. Moreover, it should be appreciated that such a development effort might be complex and time consuming, but may nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure. 
     When introducing elements of various embodiments of the present disclosure, the articles “a,” “an,” and “the” are intended to mean that there are one or more of the elements. The terms “comprising,” “including,” and “having” are intended to be inclusive and mean that there may be additional elements other than the listed elements. Additionally, it should be understood that references to “one embodiment,” “an embodiment,” or “some embodiments” of the present disclosure are not intended to be interpreted as excluding the existence of additional embodiments that also incorporate the recited features. 
     While the following discussion is generally provided in the context of a cooling system for an LED assembly for a lighting system, it should be understood that the embodiments disclosed herein are not limited to such lighting contexts. Indeed, the systems, methods, and concepts disclosed herein may be implemented in a wide variety of applications. The provision of examples in the present disclosure is to facilitate explanation of the disclosed techniques by providing instances of real-world implementations and applications. It should be understood that the embodiments disclosed herein may be useful in many applications, such as electronics (e.g., mobile devices, processors, memory devices, and so forth), food processing systems, transportation systems, and/or other industrial, commercial, and/or electronic systems for which the reduction of heat may improve cooling and device performance and longevity. 
     As discussed above, conventional cooling techniques for electronic systems, such as lighting systems, may not sufficiently cool. For example, existing cooling techniques for high intensity LED lighting instruments may suffer from certain drawbacks. As an example, cooling techniques employing cooling fluid may face some challenges because as cooling fluid is used to facilitate heat dissipation of the LED lighting instrument, the cooling fluid may be subject to different temperatures, which may decrease and/or increase the pressure of the cooling fluid in constant volumes. When the pressure increases inside the conduits or components that receive the cooling fluid, the pressure exerted on the walls of the conduits or components due to the expansion of air and coolant fluid may damage the walls of the conduits and components. 
     While manufacturing the walls of the conduits or the components out of flexible and expandable materials may reduce the impact of this increase in pressure, such manufacturing practice may not eliminate the air bubbles that may result from the increase in pressure. Indeed, the fluctuation in pressure may create bubbles in coolant fluid flow paths, thereby affecting the efficiency of the cooling technique. For example, a pump (e.g., high speed centrifugal pump) driving cooling fluid through the coolant fluid flow paths may operate in an undesired manner (e.g., stop pumping coolant fluid) if the impeller cavity is filled with air (e.g., from the air bubbles). As another example, if a larger air bubble collects in the LED lighting instrument, the LED may not receive adequate cooling and thermally fail. Accordingly, existing systems may benefit from improvements to cooling of the LED lighting instrument by reducing bubbles in the coolant fluid flow paths, the implementation of which may be difficult to develop and coordinate in various systems generating high temperatures. 
     The presently disclosed embodiments included a debubbler system that includes a check valve that may reduce the internal pressure of the debubbler system and thereby reduce the air bubbles that may be present within the debubbler system. The debubbler system may be positioned along a cooling circuit defining the flow of fluid, for example, used to cool an electronic device. The cooling circuit may define the flow of fluid between an electronic system, the debubbler system, a heat exchanger, a pump, and/or any other suitable devices. In this manner, as the pump controls the flow of fluid, the debubbler system may remove the air bubbles in the fluid to improve the overall cooling efficiency of the electronic device. The debubbler system may reduce pressure from the overall cooling circuit by allowing pressure built up within the cooling circuit to vent out of the debubbler system, as discussed in detail below. Removing pressure from the cooling circuit may be difficult because the cooling circuit may be a closed system. In this manner, the debubbler system may prevent changes in volume (e.g., expansion and contraction) resultant from changes in pressure by allowing for the vent of air bubbles and pressure, as discussed in detail below. 
     As used herein, “debubbler system” may refer to a device for removing bubbles from a fluid system, in accordance with embodiments of the present disclosure. For example, debubbler system may refer to a tri-functional coolant chamber that may allow for fluid thermal expansion, may capture bubbles and air in system, and vent and/or compensate for pressure changes. The debubbler system may be non-pressurized or pressurized (e.g., to about 6 pounds per square inch (psi)). In the case of the debubbler system being pressurized, the debubbler system may be compressible and expandable, for example, due to the enclosure of the debubbler system being of a compressible material. As used herein, “fluid” or “coolant fluid” may refer to a substance used for cooling purposes that has no fixed shape and yields to external pressures. As used herein, “bubble” or “air bubble” may refer to a globule of one substance (e.g., a gas) in another (e.g., liquid), such as an air bubble in the coolant fluid. While the embodiments below are discussed in the context of “air bubbles,” it should be understood that the present embodiments may be applied to bubbles of any gaseous substance. 
     Furthermore, the embodiments discussed herein include a discussion of various flow paths (e.g., fluid connections or coolant circuits). The flow paths (e.g., fluid connections or coolant circuits) may include multiple segments fluidly coupling two components of the cooling system. Furthermore, the segments are each configured to direct coolant fluid. In certain embodiments, the segments are configured to direct coolant fluid with no intervening components between the illustrated components. For example, each illustrated segment of each illustrated coolant fluid flow path may include a first end and a second end configured to form a direct fluid connection (e.g., via an annular conduit) between two components. However, in certain embodiments, intervening components may be present between the two illustrated components. 
     During transportation of the debubbler system (e.g., after manufacturing the debubbler system), preventing air from entering the main cooling system may help preserve functionality of the cooling system by preventing the accumulation of air bubbles. Air bubbles in the cooling system may be undesirable because when an air bubble sits over a lighting element, the coolant does not flow over the lighting element, which could lead to overheating or cooling inefficiencies. Despite messages (for a desired orientation for the debubbler system) on the packaging used to transport the debubbler system or on the debubbler system, transporting companies may fail to follow the message, resulting in harm to the lighting system. To improve the transportability and versatility of the lighting system by allowing for a number of orientations or positions during transportation and use, present embodiments for the debubbler system include one or more designs for preventing air from exiting the debubbler system and entering the lighting assembly when the debubbler system is in any number of orientations, for example, during use or transportation. 
     Lighting System 
     Turning now to the drawings,  FIG. 1  is a perspective view of an embodiment of a lighting assembly  70  having a cooling system  80  and the LED assembly  82 , in accordance with one or more current embodiments. The lighting assembly  70  includes a reflector  85  (e.g., a parabolic reflector) configured to reflect light emitted by the LED assembly  82 . For example, the light emitted by the LED assembly  82  may pass through the fluid disposed between the LED assembly  82  and the enclosure  88 , through the enclosure  88 , and may be reflected by the reflector  84  outwardly. The reflector  84  is coupled to a chassis  86  (e.g., a housing) of the lighting assembly  70 . In certain embodiments, the LED assembly  82 , the enclosure  88 , and/or other portions of the cooling system  80  may be coupled to the chassis  86 . For example, as described in greater detail below, a heat exchanger and/or pump of the cooling system  80  may be coupled to the chassis  86 . To facilitate illustration,  FIG. 1  includes a coordinate system fixed to the lighting assembly and defining a longitudinal axis  90 , a lateral axis  92 , and a vertical axis  94 . 
     Cooling System 
       FIG. 2  is an exemplary schematic diagram of a cooling system  80  of  FIG. 1  configured to actively cool the LED assembly  82  of  FIG. 2 , in accordance with one or more current embodiments. The cooling system  80  includes an enclosure  88  configured to at least partially enclose and/or house the LED assembly  82  and a heat exchanger  106  fluidly coupled to the enclosure  88 . The cooling system  80  also includes a pump  108  configured to circulate fluid (e.g., coolant, mineral oil, water, a hydrocarbon fluid, a silicon fluid, any suitable cooling fluid, or a combination thereof) along a cooling circuit  110  through the heat exchanger  106 , through the enclosure  88 , through and/or over the LED assembly  82 , through a debubbler system  112 , and back to the pump  108 . In certain embodiments, the cooling system  80  may include the LED assembly  82  or a portion thereof. 
     The LED assembly  82  may be any assembly including one or more LEDs. For example, to provide lighting for applications such as television and theater sets, film sets, tradeshows, and any one of the range of permanent, semi-permanent, and temporary settings, the LED assembly  82  may include multiple LEDs configured to emit light. While emitting light, the LEDs may produce heat and a temperature of a surrounding area (e.g., an area adjacent to the LED assembly  82  and/or within/adjacent to the enclosure  88 ) may generally increase. 
     During operation, the cooling system  80  is configured to absorb the heat generated by the LED assembly  82  and to transfer the heat to ambient air. For example, as the pump  108  circulates the fluid through the enclosure  88  and/or through the LED assembly  82 , the fluid may absorb the heat generated by the LED assembly  82 . The heat exchanger  106  may include a radiator and/or fan(s) configured to actively draw ambient air toward/across the heat exchanger  106  to cool the fluid traveling through the heat exchanger  106  and along the cooling circuit  110 , as described below. In certain embodiments, the heat exchanger  106  may include a second fluid (e.g., in addition to or in place of the ambient air) configured to exchange heat with the fluid flowing along the cooling circuit  110 . 
     The pump  108  may be a variable speed pump configured to circulate the fluid through the cooling circuit  110 . In certain embodiments, a housing of the pump  108  may include a flexible diaphragm configured to expand and/or contract based on a volume of the fluid flowing along the cooling circuit  110 . For example, as the fluid absorbs heat at and from the LED assembly  82 , the fluid may expand (e.g., thermal expansion). As the fluid flows from the LED assembly  82  and the enclosure  88 , the flexible diaphragm of the pump  108  may expand to allow the increased volume of fluid to pass through the pump without affecting the flowrate of the fluid through the pump  108  and along the cooling circuit  110 . In some embodiments, the flexible diaphragm of the pump  108  may be a service panel configured to allow access to internal portions of the pump  108 . As described in greater detail below, in certain embodiments, the flexible diaphragm may be located elsewhere along the cooling circuit  110  (e.g., in addition to or in place of be located at the pump  108 ) to facilitate thermal expansion of the fluid in the cooling circuit  110 . 
     The debubbler system  112  may include a hollow enclosure having an inlet that receives fluid along the cooling circuit  110  to remove air bubbles that build in the fluid as the fluid flows along the cooling circuit  110 . The debubbler system  112  may include a check valve  114  that restricts the flow of fluid to one direction. In this case, the check valve may allow fluid (e.g., air) out of the debubbler system  112 , such that the check valve prevents fluid (e.g., air) from entering the debubbler system. The debubbler system  112  may also include an outlet that allows the fluid to exit the debubbler system to flow to another component along the cooling circuit  110 . The debubbler system may also include a fluid level sensor  115  to monitor the fluid level inside the debubbler system  112 . A detailed discussion of the debubbler system  112  is provided below with respect to  FIGS. 17-27 . 
     The LED assembly  82  is configured to emit light, which may pass through the fluid circulating between the LED assembly  82  and the enclosure  88  and through the enclosure  88 . As such, the LED assembly  82  is configured to provide lighting for the various applications described herein (e.g., motion picture and television lighting and/or other applications that may benefit from high intensity lighting) while being cooled by the cooling system  80 . The LEDs of the LED assembly  82  may include varied/multiple configurations. For example, the LED assembly  82  may include chip scale packaging (CSP) arrays (e.g., bi-color CSP arrays). CSP technology may benefit from high density of LED chips in a specified area (e.g., per square inch/centimeter), and CSP technology may utilize different colors of individual LEDs. For example, CSP technology may include a five color configuration (e.g., warm white, cool white, red, green, and blue), a four color configuration (e.g., white, red, green, and blue), a three color configuration (e.g., red, green, and blue), a bi-color white configuration (e.g., warm white and cool white), a single white configuration, and/or a single color configuration. 
     In some embodiments, the LED assembly  82  may include single color chip on board (“COB”) arrays. The COB arrays may include a relatively large number of LEDs bonded to a single substrate and a layer of phosphor placed over the entire array. An advantage of COB technology is very high LED density per specified area (e.g., per square inch/centimeter). Additionally or alternatively, the LED assembly  82  may include discrete LEDs. 
     The cooling system  80  includes a controller  120  configured to control and/or receive signals from the LED assembly  82 , the heat exchanger  106 , the pump  108 , the debubbler system  112  (e.g., fluid level sensor  115 ), or a combination thereof. For example, the controller  120  may control some or all LEDs of the LED assembly  82  to cause the LEDs to emit light. Additionally or alternatively, the controller  120  may control operation of the heat exchanger  106  to cause the heat exchanger  106  to exchange more or less heat between the fluid and the ambient air. For example, the controller  120  may control fans of the heat exchanger  106  to control an air flow rate through/over the heat exchanger  106 . In certain embodiments, the fans of the heat exchanger  106  may be controlled via pulse width modulated (PWM) power. The fans may be controlled based on the temperature at the LED assembly  82 . In some embodiments, to reduce a noise output of the fans of the heat exchanger  106 , the controller  120  may operate the fans when cooling of the fluid by other means (e.g., via the radiator without active airflow) is insufficient. 
     As illustrated, the cooling system  80  may include a sensor  121  disposed at the LED assembly  82  and configured to output a signal (e.g., an input signal into the controller  120 ) indicative of the temperature at the LED assembly  82  and/or a temperature of the fluid adjacent to the LED assembly  82 . The sensor  121  may be any suitable temperature/thermal sensor, such as a thermocouple. In certain embodiments, the cooling system  80  may include other thermal sensor(s) disposed within the fluid and configured to output a signal indicative of a temperature of the fluid (e.g., within the enclosure  88 ) and/or disposed at the enclosure  88  and configured to output a signal indicative of a temperature at the enclosure  88 . 
     Further, the controller  120  may control operation of the pump  108  to cause the pump  108  to circulate the fluid along the cooling circuit  110  at particular flowrates. For example, based on the temperature at the LED assembly  82  and/or at the enclosure  88  (e.g., based on the signal indicative of the temperature at the LED assembly  82  received from the sensor  121 ), the controller  120  may be configured to output a signal (e.g., an output signal) to the pump  108  indicative of instructions to adjust the flowrate of the fluid flowing through the cooling circuit  110 . Furthermore, the fluid level sensor  115  may be communicatively coupled to the controller  120 . In certain embodiments, the controller  120  may be configured to output a signal (e.g., an output signal) to the pump  108  indicative of instructions to adjust the flowrate of the fluid flowing through the cooling circuit  110  based on a fluid level inside the debubbler system  112  (e.g., as determined by the fluid level sensor  115 ). For example, if the fluid level is below (or above) a fluid level threshold value as determined by the fluid level sensor  115 , the controller  120  may be output a signal (e.g., an output signal) to the pump  108  indicative of instructions to increase (or decrease) the flowrate of the fluid flowing through the cooling circuit  110  to increase (or decrease) volume of fluid within the debubbler system  112 . 
     As illustrated, the controller  120  includes a processor  122  and a memory  124 . The processor  122  (e.g., a microprocessor) may be used to execute software, such as software stored in the memory  124  to control the cooling system  80  (e.g., for controller operation of the pump  108  to control the flowrate of fluid through the cooling circuit  110 ). Moreover, the processor  122  may include multiple microprocessors, one or more “general-purpose” microprocessors, one or more special-purpose microprocessors, and/or one or more application-specific integrated circuits (ASICS), or some combination thereof. For example, the processor  122  may include one or more reduced instruction set (RISC) or complex instruction set (CISC) processors. 
     The memory device  124  may include a volatile memory, such as random-access memory (RAM), and/or a nonvolatile memory, such as read-only memory (ROM). The memory device  124  may store a variety of information and may be used for various purposes. For example, the memory device  124  may store processor-executable instructions (e.g., firmware or software) for the processor  122  to execute, such as instructions for controlling the cooling system  80 . In certain embodiments, the controller  120  may also include one or more storage devices and/or other suitable components. The storage device(s) (e.g., nonvolatile storage) may include ROM, flash memory, a hard drive, or any other suitable optical, magnetic, or solid-state storage medium, or a combination thereof. The storage device(s) may store data (e.g., measured temperatures at the LED assembly  82 ) in relational or non-relational data structures, instructions (e.g., software or firmware for controlling the cooling system  80 ), and any other suitable data. The processor  122  and/or the memory device  124 , and/or an additional processor and/or memory device, may be located in any suitable portion of the system. For example, a memory device for storing instructions (e.g., software or firmware for controlling portions of the cooling system  80 ) may be located in or associated with the cooling system  80 . 
     Additionally, the controller  120  includes a user interface  126  configured to inform an operator of the temperature at the LED assembly  82  and/or of the flowrate of the fluid through the cooling circuit  110 . For example, the user interface  126  may include a display and/or other user interaction devices (e.g., buttons) configured to enable operator interactions. It is understood that  FIG. 2  is intended to provide an exemplary schematic diagram of the cooling system  80 , and the components of the cooling system  80  (such as the pump  108 , the heat exchanger  106 , the debubbler system  112 , and the LED assembly  82 ) are not limited by the quantity and coupling as shown in  FIG. 2 , and instead, may be repositioned at various points along the cooling circuit  110 . 
       FIG. 3  is a cross-sectional view of the lighting assembly  70  of  FIG. 2  having the cooling system  80 , in accordance with one or more current embodiments. As illustrated, the cooling system  80  includes the enclosure  88 , the LED assembly  82  disposed in the enclosure  88 , the heat exchanger  106  configured to exchange heat with the fluid, and the pump  108  configured to drive circulation of the fluid. Additionally and as illustrated, the cooling system  80  includes an inlet pipe  140  coupled to the pump  108  and to a fluid inlet  142  of the enclosure  88 . Further, the cooling system  80  includes an outlet pipe  144  coupled to an outlet  146  of the enclosure  88  and to the heat exchanger  106 . In certain embodiments, the inlet pipe  140  and/or the outlet pipe  144  may extend into the LED assembly  82  and/or into the enclosure  88 . 
     As illustrated, the fluid inlet  142  may be disposed generally along a centerline of the enclosure  88  and the LED assembly  82 . The pump  108  may be configured to drive the fluid from the inlet pipe  140 , into the fluid inlet  142 , generally along the centerline of the LED assembly  82  and the enclosure  88 , into and along a gap between the LED assembly  82  and the enclosure (e.g., a gap where the fluid absorbs heat generated by the LED assembly  82 ), out of the fluid outlet  146 , and into the outlet pipe  144  (e.g., along the cooling circuit  110 ). After absorbing heat at the LED assembly  82 , the fluid may circulate through the heat exchanger  106  and return to the pump  108 . At the heat exchanger  106 , the fluid rejects the heat absorbed at the LED assembly  82 . For example, the heat exchanger  106  includes a radiator  150  and fans  152  configured to draw air (e.g., ambient air) across the radiator  150 . The air drawn across the radiator  150  may absorb heat from the fluid flowing through the radiator  150  (e.g., heat transferred from the fluid to the radiator  150 ), thereby cooling the fluid for subsequent circulation along the cooling circuit  110  and back through the LED assembly  82  and the enclosure  88 . 
     In certain embodiments, the heat exchanger  106  may not expel all the heat absorbed by the fluid at the LED assembly  82 , such that the fluid retains at least some of the heat absorbed at the LED assembly  82 . As such, a temperature of the fluid along the cooling circuit  110  (e.g., an average temperature) may increase, thereby increasing a volume of the fluid. The cooling system  80  may include a flexible membrane  154  at the pump  108  configured to expand due to heating of the fluid and to contract due to cooling of the fluid (e.g., to accommodate volumetric changes of the fluid along the cooling circuit  110 ). In certain embodiments, the flexible membrane  154  may be included elsewhere within the cooling system  80 . 
     The cooling system  80  may include a valve  156  fluidly coupled to the cooling circuit  110 . The valve  156  may be configured to bleed air and/or fluid from the cooling circuit  110 , such as when fluid is added to the cooling circuit  110  (e.g., the valve  156  may be a bleed valve). Additionally or alternatively, fluid may be added to the cooling circuit  110  via the valve  156  (e.g., the valve  156  may include a fill valve). In certain embodiments, the cooling system  80  may include multiple valves  156  with a first valve  156  being a bleed valve and a second valve  156  being a fill valve. 
     As described above, the controller  120  may be configured to control the LED assembly  82 , the heat exchanger  106 , the pump  108 , the debubbler system  112 , or a combination thereof. For example, the controller  120  may control some or all LEDs of the LED assembly  82  to cause the LEDs to emit light. Additionally, the controller  120  may control a rotation rate of the fans  152  and/or a flow rate of the fluid along the cooling circuit  110 . For example, based on feedback received from the sensor  121  at the LED assembly  82  (e.g., the temperature at the LED assembly  82 ), the controller  120  may control the rotation rate of the fans  152  and/or the flow rate of the fluid. More specifically, in response the temperature at the LED assembly  82  being greater than a target temperature and a difference between the temperature at the LED assembly  82  and/or the target temperature exceeding a threshold value, the controller may increase the rotation rate of the fans  152  and/or may increase the flow rate of the fluid. In response the temperature at the LED assembly  82  being less than the target temperature and the difference between the temperature at the LED assembly  82  and/or the target temperature exceeding a threshold value, the controller may decrease the rotation rate of the fans  152  and/or may decrease the flow rate of the fluid. 
       FIG. 4  is a perspective cross-sectional view of the lighting assembly  70  of  FIG. 2  having the cooling system  80 , in accordance with one or more current embodiments. As illustrated, the fluid of the cooling system  80  is configured to flow from the inlet pipe  140 , through the fluid inlet  142 , and through an inner annular passage  160  formed within the LED assembly  82  (e.g., in a direction  162 ). As such, the fluid enters the LED assembly  82  as a chilled fluid. The inner annular passage  160  may be coupled to the fluid inlet  142  and to an end  164  of the LED assembly  82 . From the inner annular passage  160 , the fluid may circulate through an end passage  166  formed between the end  164  of the LED assembly  82  and an end  168  of the enclosure  88 , as indicated by arrows  170 . From the end passage  166 , the fluid circulates into an outer annular passage  172  formed between the LED assembly  82  and the enclosure  88 , as indicated by arrow  174 . As the fluid flows through the outer annular passage  172 , the fluid absorbs heat generated by the LED assembly  82 . From the outer annular passage  172 , the fluid exits the enclosure  88  through the fluid outlet  146  and flows into the outlet pipe  144 . As such, the fluid exits the enclosure  88  as a heated fluid. After passing through the heat exchanger  106  and the pump  108  of the cooling system  80 , the fluid circulates back through the LED assembly  82  and the enclosure  88  to continue cooling the LED assembly  82 . 
     The lighting assembly  70  is a side emission configuration of the lighting assembly, such that the lighting assembly  70  is configured to emit light radially outwardly (e.g., from sides of the lighting assembly  70 ) and through the fluid and the enclosure  88 . As described in greater detail below in reference to  FIGS. 14 and 15 , the cooling system  80  may include a front emission configuration of the lighting assembly, such as in place of or in addition to the side emission configuration of  FIGS. 2-5 . 
       FIG. 5  is a perspective view of the LED assembly  82  of  FIG. 2 , in accordance with one or more current embodiments. As illustrated, the LED assembly  82  includes a tower  180  and LED arrays  182  mounted to the tower  180 . As illustrated, the tower  180  is a hexagonal structure formed by panels  184  (e.g., six panels  184 ) with nine LED arrays  182  mounted on each panel  184 . In certain embodiments, the tower may include more or fewer panels  184  (e.g., three panels  184 , four panels  184 , eight panels  184 , etc.) and/or each panel  184  may include more or fewer LED arrays  182  (e.g., one LED array  182 , two LED arrays  182 , five LED arrays  182 , twenty LED arrays  182 , etc.). In some embodiments, the tower  180  may be shaped differently in other embodiments and/or may be omitted. For example, the LED arrays  182  may be mounted directly to the enclosure  88  in some embodiments. In certain embodiments, the LED assembly  82  may include other LED configurations in addition to or in place of the LED arrays  182 . 
     The LED arrays  182  of the LED assembly  82  are configured to emit light outwardly through the fluid flowing between the LED assembly  82  and the enclosure  88  (e.g., through the outer annular passage  172  formed between the LED assembly  82  and the enclosure  88 ) and through the enclosure  88 . The fluid may be transparent or semi-transparent such that the fluid is configured to allow the light to pass through the fluid toward the enclosure  88 . For example, the fluid may be a dielectric and/or electrically insulating fluid having a refractive index of between 1.4 and 1.6. In some embodiments, the enclosure  88  enclosing the fluid may be acrylic, polycarbonate, glass (e.g., borosilicate glass), or another material having a refractive index between about 1.44-1.5. In certain embodiments, the LEDs of the LED arrays  182  may include silicone (e.g., a silicone layer) through which light emitted by the LEDs passes. The silicone may have a refractive index of about 1.38-1.6. As such, a type of fluid (e.g., the fluids having the refractive indices within the ranges recited above) may facilitate light passage from the LEDs, through the fluid, and toward the enclosure  88 . Additionally, the refractive index of the layer of the LED (e.g., the silicone), the fluid, and/or the enclosure  88  may generally be matched (e.g., within a difference threshold). In some embodiments, the fluid and/or the enclosure  88  may behave as lens configured to optically shape light provided by the LED assembly  82 . For example, the fluid and/or the enclosure  88  having the specific refractive indices described above may allow the fluid and/or the enclosure to shape the light to enhance illumination of the LED assembly  82 . 
     Additionally or alternatively, the fluid may include a mineral oil having a relatively long shelf life (e.g., about twenty-five years) or a fluid having properties similar to mineral oil. The fluids may be non-corrosive such that the fluids facilitate pumping along the cooling circuit  110  by the pump  108  and compatible with plastics and other system materials. Further, such fluids may generally have a relatively low viscosity, which may allow directly cooling the electronics of the LED assembly  82  (e.g., the LED arrays  182 , wiring coupled to the LED arrays  182  and to printed circuit boards (“PCB&#39;s”), and other electronic components of the LED assembly  82 ) without affecting the performance/functionality of the electronics. In certain embodiments, the type of the fluid included in the cooling circuit  110  may depend on an amount of LED arrays  182  and/or an amount of LEDs generally included in the LED assembly  82 , a structure/geometry of the LED assembly  82 , a density of LEDs of the LED assembly  82 , an amount of heat generated by the LED assembly  82 , or a combination thereof. During operation, the LED arrays  182  of the LED assembly  82  may have a power density of between 20 W-300 W per square inch, between 50 W-250 W per square inch, and other suitable power densities. In an aspect, each LED array  182  may have a surface area of 4 square inches or less. Due to the cooling systems mentioned herein, the LED arrays  182  may be operated at the aforementioned power densities for longer than 30 seconds, 1 minute, 1 hour, and 80 hours. In some embodiments, the LED assembly  82  may have a total power of 400 W-5000 W. 
     In some embodiments, the refractive index of the fluid disposed between the LED arrays  182  and the enclosure  88  may cause light to more easily leave the LED arrays  182  compared to an embodiment in which the LED arrays  182  are exposed to air. This may result in a color shift of the light emitted from the LED arrays  182 . The controller  120  may control the LED arrays  182  (e.g., the colors and/or color temperatures of the LED arrays  182 ) based on the potential color shift of the emitted light. 
     The enclosure  88  may include clear, transparent, and/or semi-transparent materials such that the light emitted by the LED assembly  82  may pass through the enclosure  88  (e.g., after passing through the fluid disposed within and/or flowing through the outer annular passage  172 ) and outwardly from the enclosure  88 . For example, the enclosure  88  may be formed of a clear plastic and/or glass (e.g., borosilicate glass). In certain embodiments, the enclosure  88  may include poly(methyl methacrylate) (“PMMA”) and/or other acrylics. 
     As illustrated, the LED assembly  82  includes printed circuit boards (“PCBs”)  190  coupled to a base PCB  192 , the LED arrays  182 , and the end  164  (e.g., end plate) of the LED assembly  82 . For example, each PCB  190  extends generally along a respective panel  184  and is coupled (e.g., physically and electrically coupled via connectors  193 ) to the LED arrays  182  coupled to the respective panel  184 . Each connector  193  is coupled to a respective LED array  182  at connections  194 . In certain embodiments, each LED array  182  may be configured to snap/click into place on the panel  184 . For example, each panel  184  may include features configured to receive the LED arrays  182  via a snap or click mechanism to facilitate assembly of the LED assembly  82 . 
       FIG. 6A  is a rear perspective view of the lighting assembly  70  of  FIG. 2  having the cooling system  80 , in accordance with one or more current embodiments. As generally described above, the cooling system  80  includes the inlet pipe  140  configured to flow fluid (e.g., chilled fluid) into the LED assembly  82  and the enclosure  88  and the outlet pipe  144  configured to receive fluid (e.g., heated fluid) from the LED assembly  82  and the enclosure  88 . The fluid circulates from the outlet pipe  144 , through the radiator  150  of the heat exchanger  106 , through the pump  108 , and back to the inlet pipe  140 . As illustrated, the cooling system includes four fans  152  configured to draw air across the radiator  150  to cool the fluid passing through the radiator  150 . In certain embodiments, the cooling system may include more or fewer fans  152  (e.g., one fan  152 , two fans  152 , three fans  152 , five fans  152 , ten fans  152 , etc.). The fans  152  are positioned above the radiator  150 , such that the heat transferred from the fluid passing through the radiator  150  moves generally upwardly toward/through the fans  152 . Additionally, the heat exchanger  106  and the pump  108  are mounted to the chassis  86  of the lighting assembly  70 . 
       FIG. 6B  is a rear perspective view of an embodiment of a lighting assembly  187  having the cooling system  80  of  FIG. 1 , in accordance with one or more current embodiments. The lighting assembly  187  includes the inlet pipe  140  configured to flow fluid (e.g., chilled fluid) into the LED assembly  82  and the enclosure  88  and the outlet pipe  144  configured to receive fluid (e.g., heated fluid) from the LED assembly  82  and the enclosure  88 . The fluid circulates from the outlet pipe  144  to the radiator  150 , through the radiator  150 , to an intermediate pipe  189 , through an expansion chamber  188  coupled to the intermediate pipe  189 , and back to the inlet pipe  140  via the pump  108 . The expansion chamber  188  is configured to expand due to heating of the fluid and to contract due to cooling of the fluid (e.g., to accommodate volumetric changes of the fluid along the cooling circuit  110 ). In certain embodiments, the expansion chamber  188  may be included elsewhere along the cooling circuit  110 , such as along the inlet pipe  140  and/or along the outlet pipe  144 . 
     As illustrated, the lighting assembly  187  includes a first bracket  191  coupled to the radiator  150  and the expansion chamber  188  and a second bracket  195  coupled to the radiator  150  and the pump  108 . The radiator  150  and the expansion chamber  188  are mounted to the first bracket  191 , and the first bracket  191  is mounted to the chassis  86 , such that the first bracket  191  is configured to support a weight of the expansion chamber  188  and/or at least a portion of a weight of the radiator  150  (e.g., to transfer forces associated with the weight(s) to the chassis  86 ). Additionally, the radiator  150  and the pump  108  are mounted to the second bracket  195 , and the second bracket  195  is mounted to the chassis  86 , such that the second bracket  195  is configured to support a weight of the pump  108  and/or at least a portion of the weight of the radiator  150  (e.g., to transfer forces associated with the weight(s) to the chassis  86 ). 
       FIG. 7  is a perspective view of an LED assembly  196  and an enclosure  198  that may be included the cooling system  80  of  FIG. 1 , in accordance with one or more current embodiments. As illustrated, the LED assembly  196  is disposed within the enclosure  198 . The LED assembly  196  includes a fluid inlet  200  configured to receive the fluid flowing along the cooling circuit  110  (e.g., as indicated by arrow  202 ) and a fluid outlet  204  configured to flow the fluid from the enclosure and the LED assembly  196  to the cooling circuit  110  (e.g., as indicated by arrow  206 ) (although the fluid direction may be reversed such that the fluid enters through the fluid outlet  204 , for example, and exits through the fluid inlet  200 ). Additionally, the enclosure  198  includes a base  208  and a cylinder  210  extending from the base  208 . In certain embodiments, the LED assembly  196  and/or the enclosure  198  of the cooling system  80  may be included in the lighting assembly of  FIGS. 2-6 . 
     The LED assembly  196  includes a tower  220  and the LED arrays  182  mounted to the tower  220 . As illustrated, the tower  220  is a hexagonal structure with nine LED arrays  182  mounted on each of the six sides of the hexagonal structure. In certain embodiments, the tower  220  may include more or fewer sides (e.g., three sides, four sides, eight sides, etc.) and/or each side may include more or fewer LED arrays  182  (e.g., one LED array  182 , two LED arrays  182 , five LED arrays  182 , twenty LED arrays  182 , etc.). In some embodiments, the tower  220  may be shaped differently in other embodiments and/or may be omitted. For example, the LED arrays  182  may be mounted directly to the enclosure  198  in some embodiments. In certain embodiments, the LED assembly  196  may include other LED configurations in addition to or in place of the LED arrays  182 . 
     The LED arrays  182  of the LED assembly  196  are configured to emit light outwardly through the fluid flowing between the LED assembly  196  and the enclosure  198  (e.g., through an outer annular passage  224  of the cooling system  80 ) and through the enclosure  198 . In some embodiments, the enclosure  198  enclosing the fluid may be acrylic, polycarbonate, glass (e.g., borosilicate glass), or another material having a refractive index between about 1.44-1.5. Additionally, the refractive index of the layer of the LED (e.g., the silicone), the fluid, and/or the enclosure  198  may generally be matched (e.g., within a difference threshold). 
     The enclosure  198  may include clear, transparent, and/or semi-transparent materials such that the light emitted by the LED assembly  196  may pass through the enclosure  198  (e.g., after passing through the fluid disposed within and/or flowing through the outer annular passage  224 ) and outwardly from the enclosure  198 . For example, the enclosure  198  may be formed of a clear plastic and/or glass (e.g., borosilicate glass). In certain embodiments, the enclosure  198  may include poly(methyl methacrylate) (“PMMA”) and/or other acrylics. 
     The cooling system  80  is configured to flow the fluid into the fluid inlet  200 , through the outer annular passage  224  between the LED assembly  196  and the enclosure  198 , and toward an end  230  of the tower  220 . The end  230  is disposed generally opposite of the base  208 . The tower  220  includes an inner annular passage  232  extending from the end  230  to the base  208 . As illustrated, the inner annular passage  232  is fluidly coupled to the outer annular passage  224  at the end  230  of the tower  220 . The cooling system  80  is configured to flow the fluid from the outer annular passage  224  and into the inner annular passage  232  via the end  230 . The inner annular passage  232  is fluidly coupled to the fluid outlet  204  such that the fluid may pass through the tower  220 , via the inner annular passage  232 , and out of the tower  220  and the enclosure  198  at the fluid outlet  204 . 
     As the fluid passes over and through the LED assembly  196  (e.g., over the LED arrays  182  and through the tower  220 ), the fluid is configured to absorb heat generated by operation of the LED arrays  182 . For example, because the fluid is configured to absorb heat generated by the LED arrays  182  while flowing through both the outer annular passage  224  and the inner annular passage  232 , the cooling system  80  is configured to significantly increase an amount of heat that may be absorbed compared to embodiments of cooling systems that extract heat from an interior or exterior of a light source. Additionally, because the fluid is generally transparent and/or semi-transparent (e.g., the fluid has a refractive index generally between 1.4-1.5), the fluid may have minimal/no effects on the light emitted from the LED assembly  196  and through the fluid. As such, the fluid may actively cool the LED assembly  196  during operation of the LED assembly  196  with little to no effect on a quality of light emitted from the LED assembly  196 . 
     The LED assembly  196  is a side emission configuration of a lighting assembly, such that the LED assembly  196  is configured to emit light radially outwardly (e.g., from sides of the LED assembly  196 ) and through the fluid and the enclosure  198 . As described in greater detail below in reference to  FIGS. 14 and 15 , the cooling system  80  may also include a front emission configuration of the lighting assembly, such as in place of or in addition to the side emission configuration of  FIGS. 7-10 . 
       FIG. 8  is a perspective cross-sectional view of the LED assembly  196  and the enclosure  198  of  FIG. 7 , in accordance with one or more current embodiments. As described above, the enclosure  198  is configured to receive the fluid from the pump  108  through the fluid inlet  200 . The fluid is then configured to contact the tower  220  and a base  300  of the LED assembly  196  coupled to the tower  220 . The tower  220  and the base  300  are configured to direct the fluid upwardly along the outer annular passage  224 . The fluid is then configured to flow through the end  230  and into the inner annular passage  232 . As illustrated, the inner annular passage  232  is formed between and by the tower  220  and PCBs  302  of the LED assembly  196 . The fluid is configured to flow downwardly within the inner annular passage  232  toward a base PCB  304  electrically coupled to the PCBs  302 . After passing over the PCBs  302  and/or the base PCB  304 , the fluid is configured to exit the tower  220  and the enclosure  198  at the fluid outlet  204 . As mentioned with respect to  FIG. 7 , the fluid direction may be reversed such that the fluid may be configured to flow in through the fluid outlet  204 , up through the inner annular passage  232 , through the end  230 , and down the outer annular passage  224 , and out the fluid inlet  200 . 
     The PCBs  302  may be electrically coupled to the LED arrays  182  such that the PCBs  302  may provide power and/or communication with the LED arrays  182 . For example, the LED assembly  196  may include wiring extending outwardly between the PCBs  302  and the LED arrays  182 . As such, the fluid may flow over the PCBs  302  and the wiring extending between the PCBs  302  and the LED arrays  182  to cool and absorb heat from the tower  220  (e.g., heat generated by the LED arrays  182  that is transferred to/absorbed by the tower  220 ), from the PCBs  302 , and/or from the wiring. Additionally, the fluid may flow over the base PCB  304  and may absorb heat from the base PCB  304 . For example, the base PCB  304  includes a wet side  306  configured to contact the fluid and a dry side generally opposite the wet side  306  that is configured to remain dry (e.g., to not contact the fluid). As generally described above, the fluid may be dielectric and/or electrically insulating such that the fluid may have minimal/no electrical effects on the LED arrays  182 , the PCBs  302 , the base PCB  304 , and the wiring of the LED assembly  196 . 
       FIG. 9  is a bottom perspective view of the LED assembly  196  and the enclosure  198  of  FIG. 7 , in accordance with one or more current embodiments. As illustrated, the base PCB  304  includes a dry side  400  configured to remain generally dry (e.g., to not contact the fluid during operation of the cooling system  80 ). The LED assembly  196  includes a gasket  402  configured to form a seal between the enclosure  198  and the LED assembly  196  (e.g., between the base  208  of the enclosure  198  and the base PCB  304  of the LED assembly  196 ). As such, the LED assembly  196  may be remain dry at the dry side  400  of the base PCB  304 , and the cooling system  80  may be configured to flow the fluid through the enclosure  198  and the tower  220  without leaking fluid. 
       FIG. 10  is a partially exploded view of the LED assembly  196  and the enclosure  198  of  FIG. 7 , in accordance with one or more current embodiments. The LED assembly  196  is configured to insert into and to be removed from the enclosure  198  as generally indicated by arrow  500 . For example, to replace portions of the LED assembly  196  (e.g., the LED arrays  182 , the PCBs  302 , the base PCB  304 , wiring, etc.), the LED assembly  196  and the enclosure  198  may be disassembled by removing the LED assembly  196  from the enclosure  198  along an axis generally parallel to arrow  500 . Additionally, while the LED assembly  196  and the enclosure  198  are disposed in the illustrated positions (e.g., with the LED assembly  196  and the enclosure  198  extending downwardly), the LED assembly  196  may be removed from the enclosure  198  with a minimal loss and/or splashing of the fluid using threaded enclosures, a gasket, a latch, and/or other securing mechanisms. To assemble/reassemble the LED assembly  196  into the enclosure  198 , the LED assembly  196  may be inserted into the enclosure  198  along the axis generally parallel to the arrow  500 . Thus, the configuration and coupling of the LED assembly  196  and the enclosure  198  described herein may facilitate quick and easy maintenance of the LED assembly  196 . 
       FIG. 11  is a side view of the cooling system  80  of  FIG. 7  and a side view of a lighting assembly  600 , in accordance with one or more current embodiments. As illustrated, the base  208  of the enclosure  198  is coupled to a heat exchanger  601 . After absorbing heat from and at the LED assembly  196 , the fluid is configured to flow into and through the heat exchanger  601 . The heat exchanger  601  includes a radiator  602  configured to exchange heat from the fluid to ambient air adjacent to the heat exchanger  601 . The heat exchanger  601  may include the radiator  602  on each of four sides of the heat exchanger  601  (e.g., four radiators  602 ). In certain embodiments, the heat exchanger  601  may include more of fewer sides with each side having the radiator  602 . The radiator  602  includes fins  604  configured to transfer heat from the fluid (e.g., to absorb heat from the fluid) to the ambient air. In some embodiments, the heat exchanger  601  may include other shapes configured to cool the fluid (e.g., a sphere, a cylinder, etc.). 
     The LED arrays  182  of the LED assembly  196  extend outwardly from the base  208  of the enclosure  198  a distance  610 . In certain embodiments, the distance  610  may be between about three inches and about nine inches. In some embodiments, the distance  610  may be about five and one-half inches. Additionally, the cooling system  80  extends a generally vertical distance  612  and a generally horizontal distance  614 . In certain embodiments, the generally vertical distance  612  may between about ten inches and about twenty inches, and/or the generally horizontal distance  614  may be between about seven inches and about seventeen inches. In some embodiments, the generally vertical distance  612  may be fourteen inches, and/or the generally horizontal distance  614  may be twelve inches. 
     The lighting assembly  600  is a prior art lighting assembly having a lighting area  620  configured to emit light. A back portion of the lighting area  620  may be a heat sink configured to absorb/transfer heat from the lighting area  620 . As illustrated, the cooling system  80  is generally smaller and more compact than the lighting area  620  and the heat sink of the lighting assembly  600 . Additionally, as generally described above, the cooling system  80  is configured to provide sufficient cooling for the LED assembly  196  as the LED assembly  196  operates at 1500 W. The lighting assembly  600  may be configured to provide cooling for lights of the lighting area  620  operating at 400 W. As such, the cooling system  80  may be more versatile than the lighting assembly  600 , and prior art lighting assemblies generally, by providing a more compact design configured to operate at significantly higher powers. In certain embodiments, the LED assembly  82  and/or the enclosure  88  of the cooling system  80  may be coupled to the heat exchanger  601 , such that the heat exchanger  601  is configured to exchange heat with the fluid circulating through the LED assembly  82  and the enclosure  88 . 
       FIG. 12  includes side views of the cooling system  80  of  FIG. 7 , in accordance with one or more current embodiments. The cooling system  80  includes a cover  700  configured to fit over/onto the enclosure  198 . The cover  700  includes materials configured to convert a color correlated temperature (“CCT”) of light emitted by the LED assembly  196 . For example, the cover  700  may include and/or be formed of phosphor and may be configured to convert a cool white CCT of about 5600K to a warmer white CCT of about 4300K, about 3200K, and other CCT&#39;s. In certain embodiments, the cover  700  may be injection molded plastic, silicone, coated glass, or a combination thereof. In certain embodiments, the cover  700  may fit over/onto the enclosure  88 , such that the cover  700  converts a CCT of light emitted by the LED assembly  82  through the enclosure  88 . 
     The cover  700  is configured to slide onto and off of the enclosure  198 , as generally noted by arrow  702 . For example, the cover  700  may be easily field changeable such that an operator may slide the cover  700  onto and off of the enclosure  198 . Additionally, light produced by a low-cost, single-color version of the LED assembly  196  may easily be converted to any CCT with the addition of the cover  700 , which may be of relatively low cost. Further, the cover  700  may be significantly more power efficient compared to traditional embodiments, because the cover  700  is not a filter removing a portion of light emitted by the LED assembly  196 . Instead, the cover  700  is configured to convert light to a desired color and CCT. 
     In certain embodiments, the LED assembly  196  may be configured to emit a blue light, cool white light (e.g., 5000K or higher), or other colors. The cover  700  may adapted for any suitable color and/or white such that light emitted from a single-color version of the LED assembly  196  (e.g., a blue light LED assembly  196  or a cool white light LED assembly  196 ) may be converted into any CCT and/or any color with no change to the LED assembly  196  or other electronics of the cooling system  80 . 
     As illustrated, the cover  700  is configured to contact the enclosure  198  while the cover  700  is disposed on the enclosure  198 . The contact between enclosure  198  and the cover  700  may allow the enclosure  198  to transfer heat to the cover  700 . The fluid flowing within the enclosure  198  may be configured to cool both enclosure  198  and the cover  700  (e.g., the fluid may absorb heat from the enclosure  198  to facilitate cooling of the cover  700 ). 
       FIG. 13  includes perspective views of the cooling system  80  of  FIG. 7  coupled to light directing assemblies  800 ,  802 , and  804  configured to direct light emitted by the LED assembly  82  of the cooling system  80 , in accordance with one or more current embodiments. For example, the light directing assembly  800  is a high bay assembly configured to be disposed in building setting and to direct light emitted by the LED assembly  82  downwardly. The light directly assembly  802  is a space light directing assembly configured to be disposed in a studio to provide environment lighting. Additionally, the light directly assembly  804  is an umbrella assembly configured to be disposed in a studio and to generally focus light emitted by the LED assembly  82 . 
       FIG. 14  is a perspective cross-sectional view of another embodiment of a lighting assembly  820  having an LED assembly  822  and the cooling system  80  of  FIG. 1 , in accordance with one or more current embodiments. The lighting assembly  820  is a front emission configuration of a lighting assembly that may be included in the cooling system  80 , such that the lighting assembly  820  is configured to emit light outwardly through a front portion of the lighting assembly  820 , as indicated by arrow  823 , rather than through side of a lighting assembly (e.g., as in lighting assembly embodiments of  FIGS. 2-13 ). Accordingly, the cooling system  80  may include a lighting assembly having a side emission configuration, a front emission configuration, and/or others. 
     The lighting assembly  820  includes a chassis  824  configured to receive and flow the fluid to cool the LED assembly  822 . As illustrated, the LED assembly  822  is disposed within and mounted to the chassis  824 . Additionally, the lighting assembly  820  includes a cover  826  coupled to the chassis  824 . The cover  826  is configured to at least partially enclose the lighting assembly  820 , such that the cover  826  directs the fluid through the lighting assembly  820  and over the LED assembly  822 . Additionally, the cover  826  may include clear, transparent, and/or semi-transparent materials such that the light emitted by the LED assembly  822  may pass through the cover  826  (e.g., after passing through the fluid) and outwardly from the cover  826 . For example, the cover  826  may be formed of a clear plastic and/or glass (e.g., borosilicate glass). In certain embodiments, the cover  826  may include poly(methyl methacrylate) (“PMMA”) and/or other acrylics and/or other materials described herein. 
     The chassis  824  includes a fluid inlet  830  configured to receive the fluid flowing along the cooling circuit  110  (e.g., as indicated by arrow  832 ) and a fluid outlet  834  configured to flow the fluid from the chassis  824  to the cooling circuit  110  (e.g., as indicated by arrow  836 ) (although the fluid direction may be reversed such that the fluid enters through the fluid outlet  834 , for example, and exits through the fluid inlet  830 ). Additionally, the chassis  824  includes a base  840  and a cylinder  842  extending from the base  840 . The base  840  includes the fluid inlet  830  and the fluid outlet  834 . In certain embodiments, the LED assembly  822  and/or the chassis  824  may be included in the lighting assembly and/or LED assembly of  FIGS. 2-13 . 
     The LED assembly  822  includes LEDs  850  mounted to a PCB  852 . The PCB  852  is mounted to the chassis  824  via connections  854 . For example, the PCB  852  includes a tab  856  extending over a ledge  858  of the chassis  824 . The connections  854  secure the LED assembly  822  to the ledge  858 . Additionally, the connections  854  may be electrical connections configured to provide power and/or electrical connections to the LEDs  850 . In certain embodiments, the PCB  852  may include an additional tab  856  disposed generally opposite the illustrated tab  856  and configured to mount to an additional ledge  858  of the chassis  824 . However, the additional tab  856  and the additional ledge  858  are omitted in  FIG. 14  for purposes of clarity. 
     The LEDs  850  of the LED assembly  822  are configured to emit light outwardly through the fluid flowing between the LED assembly  822  and the cover  826  (e.g., through an upper passage  860  of the cooling system  80 ) and through the cover  826 . In some embodiments, the cover  826  enclosing the fluid may be acrylic, polycarbonate, glass (e.g., borosilicate glass), or another material having a refractive index between about 1.44-1.5. Additionally, the refractive index of the LEDs  850  (e.g., the silicone), the fluid, and/or the cover  826  may generally be matched (e.g., within a difference threshold). 
     The cooling system  80  is configured to flow the fluid into the fluid inlet  830 , into the upper passage  860  extending between the LED assembly  822  and the cover  826  (e.g., as indicated by arrow  862 ), and into a lower passage  864  extending between the LED assembly  822  and the base  840  of the chassis  824  (e.g., as indicated by arrow  866 ). The fluid is configured to absorb heat generated by the LED assembly  822  (e.g., due to operation of the LEDs  850  and the PCB  852  and the light emitted by the LEDs  850 ) as the fluid flow through the upper passage  860  and the lower passage  864 . Additionally, because the fluid is generally transparent and/or semi-transparent (e.g., the fluid has a refractive index generally between 1.4-1.5), the fluid may have minimal/no effects on the light emitted from the LED assembly  822  and through the fluid. As such, the fluid may actively cool the LED assembly  822  during operation of the LED assembly  822  with little to no effect on a quality of light emitted from the LED assembly  822 . 
     The cooling system  80  is configured to flow the fluid from the upper passage  860  and into the fluid outlet  834 , as indicated by arrow  870 , and from the lower passage  864  into the fluid outlet  834 , as indicated by arrow  872 . After flowing the fluid over the LED assembly  822  and into the fluid outlet  834 , the pump  108  circulates the fluid through a heat exchanger  106  of the cooling system  80 , for example, to cool the fluid. 
       FIG. 15  is a perspective view of the lighting assembly  820  of  FIG. 14 , in accordance with one or more current embodiments. As described above, the cooling system  80  is configured to circulate the fluid into the fluid inlet  830  of the chassis  824 , over the LED assembly  822  of the lighting assembly  820 , and through the fluid outlet  834 , thereby cooling the LED assembly  822 . Accordingly, the lighting assembly  820  of  FIGS. 14 and 15  provides a front emission configuration of a lighting assembly and LED assembly that may be cooled via the cooling system  80 . 
       FIG. 16  is a flow diagram of a method  900  for controlling the cooling system  80  of  FIG. 1 , in accordance with one or more current embodiments. For example, the method  900 , or portions thereof, may be performed by the controller  120  of the cooling system  80 . The method  900  begins at block  902 , where the temperature at an LED assembly (e.g., the LED assembly  82 / 196 ) is measured. The sensor  121  may measure the temperature and output a signal (e.g., an input signal to the controller  120 ) indicative of the temperature at or adjacent to the LED assembly (e.g., a temperature at a surface of the LED assembly, a temperature of the fluid adjacent to and/or flowing over the LED assembly, a temperature at a surface of the enclosure  88 / 198 , etc.). The controller  120  may receive the signal indicative of the temperature. 
     At block  904 , the temperature at the LED assembly is determined. Block  904  may be performed in addition to or in place of block  902 . For example, block  902  may be omitted from the method  900 , and the sensor  121  may be omitted from the cooling system  80 . The controller  120  may be configured to determine the temperature at the LED assembly based on whether the LED assembly, or portions thereof, are emitting light and based on an amount of time that the LED assembly, or the portions thereof, have been emitting light. As generally described above, the controller  120  may be configured to control the LED assembly (e.g., by controlling which LED arrays  182  are emitting light, a duration that the LED arrays  182  emit light, an intensity of the light emitted by the LED arrays  182 , etc.). Based on the control actions, the controller  120  may determine/estimate the temperature at the LED assembly (e.g., the temperature at the surface of the LED assembly  82 / 196 , the temperature of the fluid adjacent to and/or flowing over the LED assembly  82 / 196 , the temperature at the surface of the enclosure  88 / 198 , etc.). 
     At block  906 , operating parameter(s) of the cooling system  80  are adjusted based on the temperature at the LED assembly (e.g., the temperature measured at block  902  and/or determined at block  904 ). For example, the controller  120  may output a signal (e.g., an output signal) to the pump  108  indicative of instructions to adjust the flowrate of fluid through the cooling circuit  110 . Additionally or alternatively, the controller  120  may output a signal to a heat exchanger (e.g., the heat exchanger  106 / 601 ) indicative of instructions to adjust a flow rate of air flowing over a radiator of the heat exchanger (e.g., by outputting a signal to fans of the heat exchanger  106 / 601  indicative of instructions to adjust a rotational speed of the fans to adjust the flow rate of air). In certain embodiments, the controller  120  may control the LED assembly based on the temperature at the LED assembly, such as by reducing a number of LED arrays emitting light and/or to prevent overheating of the LED assembly. 
     In certain embodiments, the controller  120  may compare the temperature at the LED assembly to a target temperature and determine whether a difference between the temperature (e.g., a measured and/or determined temperature at the LED assembly  82 / 196 ) and the target temperature is greater than a threshold value. Based on the difference exceeding the threshold value, the controller  120  may control the operating parameters of the cooling system  80  described above. As such, the controller  120  may reduce certain control actions performed by the cooling system  80  based on minor temperature fluctuations and/or may reduce an amount of air flow and/or power used by the heat exchanger to cool the fluid. The controller  120  may receive an input indicative of the target temperature (e.g., from an operator of the cooling system  80 ) and/or may determine the target temperature based on a type of LED included in the LED assembly, a type of fluid circulating through the cooling system  80 , a material of the enclosure, a material of the tower of the LED assembly, a size of the LED assembly and/or the cooling system  80  generally, or a combination thereof. 
     After completing block  906 , the method  900  returns to block  902  and the next temperature at the LED assembly is measured. Alternatively, the method  900  may return to block  904 , and the next temperature at the LED assembly may be determined. As such, blocks  902 ,  904 , and  906  of the method  900  may be iteratively performed by the controller  120  and/or by the cooling system  80  generally to facilitate cooling of the LED assembly and the enclosure. 
     Debubbler System 
       FIG. 17  is a cross-sectional view of the debubbler system  112  of  FIG. 1 , in accordance with one or more current embodiments. As mentioned above, the debubbler system  112  may include a sealed hollow enclosure  950 . The hollow enclosure  950  may include two molded enclosures  952 . In certain embodiments, the hollow enclosure  950  may include two left molded polycarbonate (PC) enclosures. Furthermore, as illustrated, the debubbler system  112  may include a debubbler inlet  954  that receives fluid along the cooling circuit  110  to remove bubbles that build in the fluid as the fluid flows along the cooling circuit  110 . The debubbler inlet  954  may include piping of any suitable size for coupling to the cooling circuit  110 . For example, the debubbler inlet may include ⅜ inch cross-linked polyethylene (PEX) tubing or piping of any suitable material and size. The hollow enclosure  950  may include a first volume (e.g., in a cavity formed at the top of the hollow enclosure  950 ) having air and a second volume (e.g., in the bottom portion of the hollow enclosure  950 ) having the fluid. In certain embodiments, the hollow enclosure  950  may be expandable, such that the hollow enclosure  950  may expand as the pressure inside the hollow enclosure  950  increases and/or as the temperature inside the hollow enclosure  950  decreases. 
     The debubbler system  112  may also include a debubbler outlet  956  that allows the fluid to exit the debubbler system  112  (to flow to another component) along the cooling circuit  110 . The debubbler outlet  956  may include piping of any suitable size for coupling to the cooling circuit  110 . In certain embodiments, the debubbler outlet  956  may be of a similar size as the debubbler inlet  954 . In this case, continuing the example above, the debubbler outlet  956  may include ⅜ inch cross-linked PEX tubing or piping of any suitable material and size. As illustrated, the debubbler outlet  956  may include an outlet bushing  958  to facilitate expelling fluid along the cooling circuit  110  via the debubbler outlet  956 . In certain embodiments, the outlet bushing  958  may be of any suitable material such as polytetrafluoroethylene (PTFE) or any other suitable material having a low coefficient of friction. The outlet bushing  958  may be right machined. 
     It should be understood that the position of the debubbler inlet  954  and the debubbler outlet  956  may be switched. For example, in certain embodiments, the opening defining the debubbler inlet  954  may instead serve as the debubbler outlet  956  (e.g., to expel fluid out toward the cooling circuit  110 ), and the opening defining the debubbler outlet  956  may instead serve as the debubbler inlet  954  (e.g., to receive fluid via the cooling circuit  110 ). In certain embodiments, the distance between the debubbler inlet  954  and outlet  956  may be of any suitable length, such that the fluid surface area exposed to the air is large enough to allow air bubbles in the fluid to rise and join on the surface to escape to the air inside the hollow enclosure  950 . In this manner, the bubbles (e.g., eventually rising to form part of the air inside the hollow enclosure  950 ) may be exhausted from the hollow enclosure via the check valve. 
     In certain embodiments, the debubbler system  112  may have an inner volume of any suitable size, for example, between about 9 in 3  to about 70 in 3 . To facilitate discussion, the example discussed below will be in the context of a debubbler system  112  having an inner volume of about 35 in 3 . In this example, the fluid level  953  (i.e., the line showing how high the fluid fills the hollow enclosure  950  of the debubbler system  112 ) may fluctuate as the fluid expands or compresses due to the fluctuation in temperatures from cooling the LED assembly  82 . In this example, for a particular type of fluid, the air may occupy 9 in 3  and the fluid may occupy a volume of 26 in 3  when the fluid is at a lowest temperature. Furthermore, in this example, when the fluid is at a highest temperature, the air may occupy a volume of 15 in 3  and the fluid may occupy a volume of 20 in 3 . Accordingly, the change in air pressure may be about 9 in 3 /15 in 3 , which may correspond to about a −5.9 pounds per square inch (PSI) change in pressure. 
     To reduce the increase in pressure resulting from this fluid expansion, the debubbler system  112  may include the check valve  114  that allows fluid to flow in one direction. In this case, the check valve  114  may allow gaseous fluid (e.g., air) out of the debubbler system  112 , such that the check valve  114  prevents any fluids from entering the debubbler system  112 . In this manner, the check valve  114  may allow air to be expelled from inside of the hollow enclosure  950  of the debubbler system  112  when the air inside the hollow enclosure  950  causes the pressure inside the hollow enclosure  950  to rise. As illustrated, the check valve  114  may include a corresponding bushing  960  to orient the check valve  114  and facilitate the exhaust of gaseous fluid out of the hollow enclosure  950 . In certain embodiments, the corresponding bushing  960  may be of any suitable material such as PTFE or any other suitable material having a low coefficient of friction. 
     The check valve  114  may be concentric with the corresponding bushing  960 . An O-ring  962  may facilitate coupling of the bushing  960  to a central axel  964 . In certain embodiments, the central axel  964  may spin in rotational direction  971  about rotation axis  973 . In certain embodiments, the central axel  964  may include a u-joint to facilitate rotation about an axis normal to a cross-sectional plane of  FIG. 17 . In this manner, the central axel may rotate about two axes. The check valve  114  may be fluidly coupled to a vent tube  966 . In certain embodiments, the vent tube  966  may be oriented substantially perpendicular to the check valve  114 , such that the junction between the check valve  114  and the vent tube  966  is substantially at a right angle or any degree between 45 degrees) (°) and 135°. In certain embodiments, an end  968  of the vent tube  966  is positioned opposite the end on which the fluid sits. In this manner, the vent tube  966  may be continuously exposed to the portion of the debubbler system  112  exposed to the air. 
     To facilitate this orientation, the debubbler system  112  may include a weighted member  970  positioned opposite the end  968  of the vent tube  966 . In this manner, gravity may guide the orientation of the debubbler system  112 , such that the preferred positional steady state of the debubbler system includes an orientation in which the weighted member  970  is positioned along the gravity vector. As illustrated, in certain embodiments, the weighted member  970  may surround or abut an internal tubing  972  configured to direct the fluid to the debubbler outlet  956  and out of the hollow enclosure  950  toward the cooling circuit  110 . In some embodiments, the weighted member  970  may include a steel block machined from 1-inch bar stock and secured to the internal tubing  972  by any suitable fixture (e.g., spring pin). It should be understood that the weighted member  970  and the vent tube  966  may be fixed to the central axel  964  via any suitable attachment (e.g., pins, weldments, and so forth) opposite the end  968 . Furthermore, the central axel  964  may rotate in rotation direction  971  about rotation axis  973 , as discussed in more detail below. As such, rotation of the central axel  964  may also cause the vent tube  966  and the weighted member  970  to rotate in similar direction. In certain embodiments, the weighted member may be any percentage of the total weight of the debubbler system  112 , such as 25%, 50%, 75%, 80% or any suitable percent there between. 
       FIGS. 18A-18C  illustrate respective cross-sectional views of the debubbler system  112  for a particular orientation. As discussed above, during transportation of the debubbler system  112  and prior to installation, the debubbler system  112  may be manipulated to various orientations. Regardless of the orientation, in some embodiments, air bubbles may be prevented from entering the debubbler system  112 , for example, during transportation. To illustrate one of these orientations,  FIG. 18A  is a cross-sectional view of the debubbler system  112  of  FIG. 1  in a first orientation  974  having a weighted member  970  at the bottom of the debubbler system  112  of  FIG. 1 , in accordance with one or more current embodiments. In certain implementations, a portion or the entirety of the weighted member  970  remains below the water level. In the first orientation  974 , the weighted member  970  may be positioned at the bottom of the debubbler system  112  relative to a gravity vector  975 . As illustrated, when the debubbler system  112  is in the first orientation  974 , the weighted member  970  may align the debubbler inlet  954  and the debubbler outlet  956  such that they are under the fluid level  953 . In this manner, air is prevented from exiting the hollow enclosure  950  during transportation of the debubbler system  112  and/or air cannot enter the debubbler system  112  via the debubbler outlet  956 . In certain embodiments, during transportation of the debubbler system  112 , fluid does not flow through the debubbler inlet  954  and the debubbler outlet  956 . During installation of the debubbler system  112  to the lighting assembly  70 , air bubbles may enter the system (e.g., via the debubbler inlet or outlet  954 ,  956 ). The air bubbles may rise to the top of the fluid level and settle on the surface (e.g., due to buoyancy) before escaping the fluid and into the air to be removed by the check valve  114  (e.g., via the vent tube  966 ). The distance between the debubbler inlet  954  and outlet  956  may be of any suitable length, such that the fluid surface area exposed to the air is of a size to enable air bubbles in the fluid to rise and join on the surface to escape to the air inside the hollow enclosure  950 . 
       FIG. 18B  is a cross-sectional view of the debubbler system of  FIG. 1  in a second orientation  976  having the debubbler inlet  954  oriented opposite a direction of the gravity vector  975 , in accordance with one or more current embodiments. As illustrated, the debubbler system  112  may be transported or in operation in the second orientation  976 . In the second orientation, the fluid level may cover an inlet port  977 . The inlet port  977  may define a conduit out of which the fluid flows after being received at the debubbler inlet  954  from the cooling circuit  110  ( FIG. 1 ). In the second orientation, the fluid level may cover the vent tube  966 , such that the end  968  is under the fluid level  953 . In the second orientation, the volume of the fluid in the debubbler system  112  may be at a fluid level  953  that prevents air from exiting the debubbler system  112  and/or entering the debubbler system  112  via the debubbler outlet  956 . In certain embodiments, as the fluid compresses or expands (e.g., based on changes in temperature during transportation), air does not escape the debubbler system  112 . The debubbler system  112  may not be in operation (e.g., receiving and exhausting coolant fluid driven by a pump, as discussed below) when it is oriented in the second orientation  976 , for example, because air bubbles may still leave the fluid, but the air bubbles may not be able to exhaust out of the check valve  114 . The debubbler system  112  may be oriented in the second orientation  976  during transportation of the debubbler system  112 . 
       FIG. 18C  is a cross-sectional view of the debubbler system of  FIG. 1  in a third orientation  978 , in which the debubbler outlet  956  is positioned opposite the gravity vector  975 , in accordance with one or more current embodiments. Similar to in the second orientation  976 , in the third orientation  978 , the fluid level  953  may cover the vent tube  966 , such that the end  968  is under the fluid level  953 . In the third orientation  978 , the volume of the fluid in the debubbler system  112  may be at a fluid level  953  that prevents air from exiting the debubbler system  112  and/or enter the debubbler system  112  via the debubbler outlet  956 . In certain embodiments, as the fluid compresses or expands (e.g., based on changes in temperature during transportation), air does not escape the debubbler system  112  because the end  968  of the vent tube  966  is under the fluid level  953 . The debubbler system  112  may not be in operation (e.g., receiving and exhausting coolant fluid driven by a pump, as discussed below) when it is oriented in the third orientation  978 , for example, because air bubbles may still leave the fluid, but the air bubbles may not be able to exhaust out of the check valve  114 . The debubbler system  112  may be oriented in the third orientation  978  during transportation of the debubbler system  112 . 
       FIG. 19  is a flow diagram of a first arrangement  980  of the cooling system  80  of  FIG. 1 , including the debubbler system  112  of  FIG. 17 , in accordance with one or more current embodiments. As described above with respect to  FIG. 3 , the cooling system  80  may include an inlet pipe  140  fluidly coupled to the pump  108  and to a fluid inlet  142  of the LED assembly  82 . The inlet pipe  140  may direct the flow of fluid into the center of the LED assembly  82 . The cooling system  80  may also include an outlet pipe  144  fluidly coupling the outlet  146  to an inlet of the heat exchanger  106  (e.g., radiator  150 ). The cooling system  80  may include a radiator outlet pipe  982  fluidly coupling the outlet of the heat exchanger to the inlet of the pump  108 . The inlet pipe  140 , the outlet pipe  144 , and the radiator outlet pipe  982  are illustrated as a solid dark line to reference that they may collectively define a first cooling flow path  984 . 
     The debubbler system  112  may receive, via debubbler inlet pipe  986 , a portion of the fluid directed out from the LED assembly  82 . As discussed above, in certain configuration, the debubbler inlet  954  may serve as the outlet, while the debubbler outlet  956  may serve as the inlet. That is, the outlet pipe  144  may direct fluid to the heat exchanger  106  and the opening  956  (previously referred to as the debubbler outlet  956 ). For example, the flow path of fluid exiting the LED assembly  82  may split to direct fluid toward the debubbler system  112  and the heat exchanger  106 . In certain embodiments, the fluid received by the debubbler system  112  may bypass the heat exchanger  106  and may expand inside the debubbler system  112  while the check valve  114  removes air bubbles. In certain embodiments, the check valve  114  may release pressure in response to the pressure within the enclosure exceeding a certain pressure threshold value. For example, for a pump  108  rated to output fluid at 3 PSI, the pressure threshold value may be 0.5 PSI, such that the check valve  114  may vent air out from the hollow enclosure  950  in response to the internal pressure exceeding the pressure threshold (e.g., 0.5 PSI). By venting air out from the hollow enclosure  950  as the pressure rises, the bubbles in the fluid may be reduced, thereby improving the cooling properties of the fluid and the overall cooling of the LED assembly  82 . 
     Fluid received via the opening  956  (previously referred to as the debubbler outlet  956 ) may exit the debubbler system  112  via the opening  954  (previously referred to as the debubbler inlet  954 ) by way of a debubbler outlet pipe  988  to join with the radiator outlet pipe  982 . In this case, the pump  108  may receive fluid from the heat exchanger  106  (e.g., via the radiator outlet pipe  982 ) and from the debubbler system  112  (e.g., via the opening  954 ) to direct the fluid back to the LED assembly  82 . The debubbler system  112  may receive fluid via a second fluid flow path  990  defined by the outlet pipe  144 , the debubbler inlet pipe  986 , the debubbler outlet pipe  988 , and an inlet to the pump  108  (as well as all intermediate components, such as the LED assembly  82 , the debubbler system  112 , and the pump  108 ). To facilitate illustration, the second fluid flow path  990  is illustrated with a dashed line. In certain embodiments, the second fluid flow path  990  does not include the heat exchanger  106 , such that the debubbler system  112  receives fluid from the LED assembly  82  (and not the heat exchanger  106 ) to remove air bubbles prior to directing fluid back to the pump  108 . 
       FIG. 20  is a flow diagram of a second arrangement  992  of the cooling system  80  of  FIG. 1 , including the debubbler system  112  of  FIG. 1 , in accordance with one or more current embodiments. As described above with respect to  FIG. 3 , the cooling system  80  may include an inlet pipe  140  fluidly coupling the pump  108  to a fluid inlet  142  of the LED assembly  82 . The inlet pipe  140  may direct the flow of fluid into the LED assembly  82 , as described above with respect to  FIG. 8 . The cooling system  80  may also include an outlet pipe  144  fluidly coupling the outlet  146  to an inlet of the heat exchanger  106  (e.g., radiator  150 ), as described above with respect to  FIG. 8 . The cooling system  80  may include a radiator outlet pipe  982  fluidly coupling the outlet of the heat exchanger to the inlet of the pump  108 . The inlet pipe  140 , the outlet pipe  144 , and the radiator outlet pipe  982  are illustrated as a solid dark line to reference that they may collective define a first cooling flow path  984 . 
     As illustrated, the second arrangement  992  includes the debubbler system  112 . In certain embodiments, the debubbler system  112  may receive fluid from two flow paths. First, the debubbler system  112  may receive fluid directly from the LED assembly  82 , for example, via the fluid outlet  204  (e.g., as shown in  FIG. 8 ) by way of the first debubbler inlet pipe  986 A. Second, the debubbler system  112  may receive fluid from the heat exchanger  106  by way of a second debubbler inlet pipe  986 B. For example, the fluid exiting the heat exchanger  106  via the radiator outlet pipe  982  may be directed to the pump  108  and the debubbler system  112 . It should be understood that in certain embodiments, the debubbler system  112  may receive fluid from one flow path, such that either the first debubbler inlet pipe  986 A or the second debubbler inlet pipe  986 B may be omitted. 
     The debubbler system  112  may receive fluid via a second fluid flow path  990  defined by the first debubbler inlet pipe  986 A, the debubbler outlet pipe  988 , and an inlet to the pump  108  (as well as all intermediate components, such as the LED assembly  82 , the debubbler system  112 , and the pump  108 ). In certain embodiments, the second fluid flow path  990  does not include the heat exchanger  106 . 
     The debubbler system  112  may receive fluid via a third fluid flow path  994  defined by the outlet pipe  144 , the radiator outlet pipe  982 , the second debubbler inlet pipe  986 B, the debubbler outlet pipe  988 , and an inlet to the pump  108  (as well as all intermediate components, such as the LED assembly  82 , the debubbler system  112 , and the pump  108 , and the heat exchanger  106 ). In the second arrangement  992 , the debubbler system  112  receives fluid from the LED assembly  82  and the heat exchanger  106  to remove air bubbles that may have developed in the LED assembly  82  and the heat exchanger  106 . Fluid received via the opening  956  (previously referred to as the debubbler outlet  956 ) may exit the debubbler system  112  via the opening  954  (previously referred to as the debubbler inlet  954 ) by way of a debubbler outlet pipe  988  to join with the radiator outlet pipe  982 . In this case, the pump  108  may receive fluid from the heat exchanger  106  (e.g., via the radiator outlet pipe  982 ) and from the debubbler system  112  (e.g., via the opening  954 ) to direct the fluid back to the LED assembly  82 . In an embodiment, the second fluid flow path  990  and the third fluid flow path  994  may be alternative flow paths. 
     In certain embodiments, the fluid received by the debubbler system  112  (e.g., from the LED assembly  82  and/or the heat exchanger  106 ) may expand inside the debubbler system  112  and the check valve  114  may remove air bubbles. In certain embodiments, the check valve  114  may release pressure in response to the pressure within the enclosure exceeding or reaching a certain pressure threshold value. For example, for a pump  108  rated to output fluid at 3 PSI, the pressure threshold value may be 0.5 PSI, such that the check valve  114  may vent air out from the hollow enclosure  950  in response to the internal pressure exceeding the pressure threshold (e.g., 0.5 PSI). In this manner, by venting air out from the hollow enclosure  950  as the pressure rises, the bubbles in the fluid may be reduced, thereby improving the cooling properties of the fluid and the overall cooling of the LED assembly  82 . 
       FIG. 21  is a flow diagram of a third arrangement  996  of the cooling system  80  of  FIG. 1 , including the debubbler system  112  of  FIG. 1 , in accordance with one or more current embodiments. While the first and second arrangements  980 ,  992  of  FIGS. 19 and 20 , respectively, include the debubbler system  112  as separate from the pump  108 , in certain embodiments, the pump  108  may be integral to the debubbler system  112 , such that the debubbler system  112  may be positioned in series with respect to the first cooling flow path  984 , as illustrated. In certain embodiments, the debubbler system may be fluidly coupled to the pump  108  and/or the heat exchanger  106 , for example, in a parallel arrangement. It should be understood that in certain embodiments, such as the third arrangement  996 , the debubbler system  112  may be fluidly coupled to the pump  108  and the heat exchanger  106 , for example, in series. 
     As described above with respect to  FIG. 3 , the cooling system  80  may include an inlet pipe  140  fluidly coupling to the pump  108  and to a fluid inlet  142  of the LED assembly  82 . The inlet pipe  140  may direct the flow of fluid into the center of the LED assembly  82 . The cooling system  80  may also include an outlet pipe  144  fluidly coupling the outlet  146  to an inlet of the heat exchanger  106  (e.g., radiator  150 ). The cooling system  80  may include a radiator outlet pipe  982  fluidly coupling the outlet of the heat exchanger  106  to the opening  956  (previously referred to as the debubbler outlet  956 ) of the debubbler system  112 . 
     The debubbler system  112  may receive, via the radiator outlet pipe  982 , the fluid from the heat exchanger  106 . For example, the fluid exiting the LED assembly  82  may be directed to the heat exchanger  106  to be cooled. Then the fluid may be directed to the debubbler system  112  and the heat exchanger  106  to remove air bubbles in the fluid. In certain embodiments, the check valve  114  of the debubbler system  112  may release pressure in response to the pressure within the enclosure exceeding a certain pressure threshold value. For example, for a pump  108  rated to output fluid at 3 PSI, the pressure threshold value may be 0.5 PSI, such that the check valve  114  may vent air out from the hollow enclosure  950  in response to the internal pressure exceeding the pressure threshold (e.g., 0.5 PSI). In this manner, by venting air out from the hollow enclosure  950  as the pressure rises, the bubbles in the fluid may be reduced, thereby improving the cooling properties of the fluid and the overall cooling of the LED assembly  82 . Although  FIG. 21  illustrates the debubbler system  112  and the pump  108  as separate components in series, the debubbler system  112  and the pump  108  may also be combined into a single component. 
       FIG. 22  is a rear perspective view of an embodiment of the lighting assembly  187  of  FIG. 6A  including the cooling system  80  of  FIG. 1 , having the debubbler system  112  of  FIG. 1 , in accordance with one or more current embodiments. To facilitate illustration, the LED assembly  82  has been omitted from the schematic diagram of  FIG. 22 , but the inlet pipe  140 , the outlet pipe  144 , and the valve  156  have been reproduced. As illustrated, the heat exchanger  106  and the pump  108  are mounted to the chassis  86  of the lighting assembly  70 . The heat exchanger  106  may include the radiator  150  and any number of fans  152 , as discussed above. 
     As illustrated, the lighting assembly  187  includes a first bracket  191  coupled to the radiator  150  and debubbler system  112 , and a second bracket  195  coupled to the radiator  150  and the pump  108 . The first and second brackets  191 ,  195  may include vibration pads. The radiator  150  and the debubbler system may be mounted to the first bracket  191 , and the first bracket  191  is mounted to the chassis  86 , such that the first bracket  191  is configured to support a weight of the debubbler system  112  and/or at least a portion of a weight of the radiator  150  (e.g., to transfer forces associated with the weight(s) to the chassis  86 ). Additionally, the radiator  150  and the pump  108  may be mounted to the second bracket  195 , and the second bracket  195  is mounted to the chassis  86 , such that the second bracket  195  is configured to support a weight of the pump  108  and/or at least a portion of the weight of the radiator  150  (e.g., to transfer forces associated with the weight(s) to the chassis  86 ). In certain embodiments, the heat exchanger  106 , the pump  108 , and the debubbler system  112  may be housed inside the lighting assembly  187 . 
       FIG. 23  is a perspective view of an inside of the hollow enclosure  950 , in accordance with one or more current embodiments. As mentioned above, the hollow enclosure  950  may include two molded enclosures  952  forming a sealed cavity. In some embodiments, the hollow enclosure  950  may expand. As illustrated, the vent tube  966  may be positioned on an opposite end from the weighted member  970 . For example, the vent tube  966  and the weighted member  970  may be fixed to the central axel  964 , such that the central axel  964  is configured to rotate in rotation direction  971  about the rotation axis  973 . The rotation axis  973  may intersect the center of the circular cross-section of the central axel  964 . The rotation axis  973  may be perpendicular to a line formed between the end  968  of the vent tube  966  and the weighted member  970 . By rotating relative to the rotation axis  973 , the vent tube  966  may remain above the fluid level because as the fluid level settles in accordance with the gravity vector  975 , the weight member  970  may also rotate to settle with the gravity. In addition or alternatively, a u-joint associated with the central axel  964  may facilitate rotation along another axis (e.g., perpendicular to the rotation axis  973 ). 
       FIGS. 24, 25, and 26  are respective cross-section views of the debubbler system  112  of  FIG. 2 , including a fluid level sensor  115 , in accordance with one or more current embodiments. The fluid level sensor  115  may include photodiode  998  configured to detect light produced by a light source  999 . The photodiode  998  may include any suitable semiconductor device configured to convert light into an electrical current (e.g., a signal) communicated to the controller  120  ( FIG. 1 ). The electrical current may be generated in response to photons absorbed by the photodiode  998 . In certain embodiments, the photodiode  998  may include optical filters, built-in lenses, and a surface area for receiving photons. 
     The light source  999  may include any suitable light source, such as a laser beam (e.g., red laser beam). For example, the light source  999  may include any suitable device that emits light through optical amplification based on the stimulated emission of electromagnetic radiation. The debubbler system  112  may include a mirror  1000  positioned on the central axel  964 . In certain embodiments, the mirror  1000  may be fixed to the central axel  964 , such that the mirror  1000  rotates with the central axel. The mirror  100  may be disk-shaped with a central opening such that the internal tubing  972  extends through the central opening. 
     As discussed above, the fluid level sensor  115  (e.g., the photodiode  998  and the light source  999 ) may be communicatively coupled to the controller  120 . The controller  120  may output a signal to the light source  999  to cause the light source  999  to emit a light that may be detected by the photodiode  998 . In certain embodiments, the controller  120  may be configured to output a signal (e.g., an output signal) to the pump  108  indicative of instructions to adjust the flowrate of the fluid flowing through the cooling circuit  110  based on a fluid level inside the debubbler system  112 . For example, if the fluid level is below a fluid level threshold value as determined by the fluid level sensor  115  (and communicated to the controller  120 ), the controller  120  may output a signal (e.g., an output signal) to the pump  108  indicative of instructions to increase the flowrate of the fluid flowing through the cooling circuit  110  to increase the volume within the debubbler system  112 . 
     As illustrated in  FIG. 24 , the fluid level  953  ( FIG. 17 ) may be above a threshold fluid level (e.g., sufficient for fluid to flow through the debubbler inlet  954  and the debubbler outlet  956 ). When the fluid level  953  is above the threshold fluid level, the light emitted from the light source  999  may pass through the fluid. Because the index of refraction associated with the fluid may be higher than the index of refraction associated with air, the emitted light may diffract (e.g., bend), reflect off the mirror  1000 , and be detected by the photodiode  998 . In this case, the controller  120  may receive the indication of the detection of light from the light source  999  by the photodiode  998  to cause the pump  108  to maintain the flow rate of fluid. 
     As illustrated in  FIG. 25 , the fluid level  953  ( FIG. 17 ) may be below the threshold fluid level. When the fluid level  953  is below a threshold fluid level (e.g., insufficient for fluid to flow through the debubbler inlet  954  and the debubbler outlet  956 ), the light emitted from the light source  999  may pass through air. In this case, the emitted light may not be diffracted, so it may go undetected by the photodiode  998  (e.g., because the emitted light does not reflect off the mirror  1000  toward the photodiode  998 ). In this case, the controller  120  may receive the indication of the lack of detection of light from the light source  999  by the photodiode  998  to cause the pump  108  to increase the flow rate of fluid. 
     As illustrated in  FIG. 26 , the photodiode  998  and light source  999  may be positioned in close proximity to one another. For example, the photodiode  998  may be positioned slightly below the threshold fluid level and the light source  999  may be positioned above the rotation axis  973  and below the photodiode  998 . In certain embodiments, the fluid level sensor  115  (e.g., the photodiode  998  and light source  999 ) may be positioned external to the hollow enclosure  950 . In this manner, servicing and replacing the fluid level sensor  115  or any suitable component of the fluid level sensor  115  may be more easily replaced. 
       FIGS. 27A-C  illustrate the lighting assembly  70  and the corresponding debubbler system  112  in various orientations, in accordance with one or more current embodiments. In particular,  FIG. 27A  is a schematic diagram of the lighting assembly  70  of  FIG. 1  oriented in an upward position,  FIG. 27B  is a schematic diagram of the lighting assembly of  FIG. 1  oriented in a horizontal position, and  FIG. 27C  is a schematic diagram of the lighting assembly of  FIG. 1  oriented in a downward position, in accordance with one or more current embodiments. To facilitate illustration,  FIGS. 27A-C  include the coordinate system of  FIG. 1  fixed to the lighting assembly and defining a longitudinal axis  90 , a lateral axis  92 , and a vertical axis  94 . As the lighting assembly  70  is oriented (e.g., to provide light to a particular target) the debubbler system  112  may also be oriented, such that the weighted member  970  (and the central axel  964 ) rotates to conform to the gravity vector  975 . 
     Technical effects of the present disclosure include debubbler systems and methods to reduce bubbles in coolant flow paths associated with light cooling systems of an electronic systems to improve cooling of electronic systems. The debubbler system may include a hollow enclosure that includes an inlet and an outlet to receive coolant fluid via the coolant fluid flow path. Technical effects of the present disclosure include not allowing air to enter the hollow enclosure during transportation of the debubbler system to ensure proper fluid properties resultant from reduced air bubbles. The debubbler system may include a check valve to exhaust air bubbles in the coolant fluid out of the hollow enclosure to reduce air bubbles in the coolant fluid. The check valve may be fluidly coupled to the vent tube, such that an opening of the vent tube is above the fluid. 
     This written description uses examples of the presently disclosed embodiments, including the best mode, and also to enable any person skilled in the art to practice the disclosed embodiments, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the disclosed embodiments is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal language of the claims. That is, while only certain features of the disclosure have been illustrated and described herein, many modifications and changes will occur to those skilled in the art. It is, therefore, to be understood that the appended claims are intended to cover all such modifications and changes as fall within the true spirit of the disclosure. 
     The techniques presented and claimed herein are referenced and applied to material objects and concrete examples of a practical nature that demonstrably improve the present technical field and, as such, are not abstract, intangible or purely theoretical. Further, if any claims appended to the end of this specification contain one or more elements designated as “means for [perform]ing [a function]. . . ” or “step for [perform]ing [a function]. . . ”, it is intended that such elements are to be interpreted under 35 U.S.C. 112(f). However, for any claims containing elements designated in any other manner, it is intended that such elements are not to be interpreted under 35 U.S.C. 112(f).