Systems and methods for high output, high color quality light

Abstract

Systems and methods for a high output, high color quality light are disclosed. In some embodiments, such a light may include a light fixture including one or more LEDs configured to output a cumulative light output; wherein the cumulative light output comprises an intensity of greater than or equal to 10,000 lumens; and wherein the cumulative light output comprises a CRI of at least 90.

What is claimed: 
     
       1. A light fixture comprising:
 a plurality of LEDs configured to output a cumulative light output, the plurality of LEDs comprising two or more strings of LEDs, at least two of the two or more strings of LEDs comprising different color LEDs, the two or more strings of LEDs comprising a first string of LEDs and a second string of LEDs connected in parallel with the first string of LEDs; 
 a first current control device connected in series with the first string of LEDs and configured to control a drive current provided to the plurality of LEDs, wherein the drive current comprises at least 700 mA; and 
 a second current control device connected in series with the second string of LEDs and configured to control the drive current provided to the plurality of LEDs; 
 a first voltage measurement device coupled to the first string of LEDs and the second string of LEDs, the first voltage measurement device coupled to the first current control device and configured to control the first current control device; and 
 a second voltage measurement device coupled to the first string of LEDs and the second string of LEDs, the second voltage measurement device coupled to the second current control device and configured to control the second current control device; 
 wherein the cumulative light output comprises an intensity of greater than or equal to 10,000 lumens and a color temperature of greater than or equal to 4000° K color rendering index (CRI) of at least 94. 
 
     
     
       2. The light fixture of  claim 1 , wherein the a plurality of LEDs comprise two or more strings of LEDs. 
     
     
       3. The light fixture of  claim 2 , wherein at least two of the two or more strings of LEDs comprise different color LEDs. 
     
     
       4. The light fixture of claim  3  1, wherein at least one of the strings comprises a Blue Shifted Yellow String and at least one of the strings comprises a Red String. 
     
     
       5. The light fixture of claim  3  1, wherein each of the strings comprises a Blue Shifted Yellow String with a different color temperature. 
     
     
       6. The light fixture of  claim 3 , wherein the two or more strings of LEDs comprise a first string of LEDs and a second string of LEDs connected in parallel with the first string of LEDs, and wherein the light fixture further comprises:
 a first current control device connected in series with the first string of LEDs;   a second current control device connected in series with the second string of LEDs;   a first voltage measurement device coupled to the first string of LEDs and the second string of LEDs, the first voltage measurement device coupled to the first current control device and configured to control the first current control device; and   a second voltage measurement device coupled to the first string of LEDs and the second string of LEDs, the second voltage measurement device coupled to the second current control device and configured to control the second current control device.   
     
     
       7. The light fixture of claim  6  1, wherein each of the first and second current control devices comprise: a Bipolar Junction Transistor (BJT); a MOSFET; a junction gate field-effect transistor (JFET); or an insulated gate field effect transistor (IGFET). 
     
     
       8. The light fixture of  claim 7 , wherein each of the first and second voltage measurement devices comprise: a comparator and an op-amp. 
     
     
       9. The light fixture of claim  6  1, further comprising a third string of LEDs connected in series with the first and second string of LEDs. 
     
     
       10. The light fixture of claim  6  1, further comprising:
 a pulse generator; 
 an RC circuit coupled to the pulse generator; and 
 a third current control device coupled to the RC circuit, the third current control device configured to vary the voltage measured by the second voltage measurement device. 
 
     
     
       11. The light fixture of  claim 1 , further comprising:
 a plurality of heat-sink-mounted LED array modules, each module engaging an LED-adjacent surface of a heat-sink base for transfer of heat from the module; 
 a heat-sink heat-dissipating surface extending away from the modules; 
 at least one venting aperture through the heat-sink base to provide air ingress to the heat-dissipating surfaces adjacent to the aperture. 
 
     
     
       12. The light fixture of  claim 1 , further comprising:
 a housing and an LED assembly secured with respect thereto and open to permit air/water-flow over the LED assembly, the LED assembly comprising:
 an LED-array; 
 an extruded heat sink that has a base and heat-transfer surfaces extending from the base, wherein the heat-transfer surfaces are surfaces of a plurality of fins extending away from the base in a first direction, the fins including first and second fins along the opposite edges of the base, the first and second edge-adjacent fins also extending from the base in a second direction opposite to the first direction. 
 
 
     
     
       13. A light fixture comprising:
 a plurality of LEDs configured to output a cumulative light output at an efficiency, the plurality of LEDs comprising two or more strings of LEDs, the two or more strings of LEDs comprising a first string of LEDs and a second string of LEDs connected in parallel with the first string of LEDs; 
 a first current control device connected in series with the first string of LEDs and configured to control a drive current provided to the plurality of LEDs, wherein the drive current comprises at least 700 mA; and 
 a second current control device connected in series with the second string of LEDs and configured to control the drive current provided to the plurality of LEDs; 
 a first voltage measurement device coupled to the first string of LEDs and the second string of LEDs, the first voltage measurement device coupled to the first current control device and configured to control the first current control device; and 
 a second voltage measurement device coupled to the first string of LEDs and the second string of LEDs, the second voltage measurement device coupled to the second current control device and configured to control the second current control device; 
 wherein the cumulative light output comprises an intensity of greater than or equal to 10,000 lumens and a color temperature of greater than or equal to 4000° K color rendering index (CRI) of at least 90. 
 
     
     
       14. The light fixture of  claim 13 , wherein the a plurality of LEDs comprise two or more strings of LEDs. 
     
     
       15. The light fixture of  claim 14 , wherein the two or more strings of LEDs comprise a first string of LEDs and a second string of LEDs connected in parallel with the first string of LEDs, and wherein the light fixture further comprises:
 a first current control device connected in series with the first string of LEDs;   a second current control device connected in series with the second string of LEDs;   a first voltage measurement device coupled to the first string of LEDs and the second string of LEDs, the first voltage measurement device coupled to the first current control device and configured to control the first current control device; and   a second voltage measurement device coupled to the first string of LEDs and the second string of LEDs, the second voltage measurement device coupled to the second current control device and configured to control the second current control device.   
     
     
       16. The light fixture of claim  15  13, wherein each of the first and second current control devices comprise: a Bipolar Junction Transistor (BJT); a MOSFET; a junction gate field-effect transistor (JFET); or an insulated gate field effect transistor (IGFET). 
     
     
       17. The light fixture of  claim 16 , wherein each of the first and second voltage measurement devices comprise: a comparator and an op-amp. 
     
     
       18. The light fixture of claim  15  13, further comprising a third string of LEDs connected in series with the first and second string of LEDs. 
     
     
       19. The light fixture of claim  15  13, further comprising:
 a pulse generator; 
 an RC circuit coupled to the pulse generator; and 
 a third current control device coupled to the RC circuit, the third current control device configured to vary the voltage measured by the second voltage measurement device. 
 
     
     
       20. The light fixture of  claim 13 , further comprising:
 a plurality of heat-sink-mounted LED array modules, each module engaging an LED-adjacent surface of a heat-sink base for transfer of heat from the module; 
 a heat-sink heat-dissipating surfaces extending away from the modules; 
 at least one venting aperture through the heat-sink base to provide air ingress to the heat-dissipating surfaces adjacent to the aperture. 
 
     
     
       21. The light fixture of  claim 13 , further comprising:
 a housing and an LED assembly secured with respect thereto and open to permit air/water-flow over the LED assembly, the LED assembly comprising:
 an LED-array; 
 an extruded heat sink that has a base and heat-transfer surface extending from the base, wherein the heat-transfer surfaces are surfaces of a plurality of fins extending away from the base in a first direction, the fins including first and second fins along the opposite edges of the base, the first and second edge-adjacent fins also extending from the base in a second direction opposite to the first direction. 
 
 
     
     
       22. The light fixture of  claim 1 , wherein the cumulative light output comprises an intensity from 10,000 lumens to 74,468 lumens. 
     
     
       23. The light fixture of  claim 1 , wherein the light fixture is configured to operate based on a drive current comprising a current from 700 mA to 1000 mA. 
     
     
       24. The light fixture of  claim 1 , wherein the cumulative light output comprises a total radiant flux from 30,900 mW to 41,600 mW. 
     
     
       25. The light fixture of  claim 1 , wherein the cumulative light output comprises a color temperature from 4000° K to 5000° K. 
     
     
       26. The light fixture of  claim 1 , wherein the cumulative light output comprises an intensity from 10,000 lumens to 74,468 lumens, and wherein the light fixture is configured to operate based on a drive current comprising a current from 700 mA to 1000 mA. 
     
     
       27. The light fixture of  claim 13 , wherein, the cumulative light output comprises an intensity from 10,000 lumens to 74,468 lumens. 
     
     
       28. The light fixture of  claim 13 , wherein the light fixture is configured to operate based on a drive current comprising a current from 700 mA to 1000 mA. 
     
     
       29. The light fixture of  claim 13 , wherein the cumulative light output comprises a total radiant flux from 30,900 mW to 41,600 mW. 
     
     
       30. The light fixture of  claim 13 , wherein the cumulative light output comprises a color temperature from 4000° K to 5000° K. 
     
     
       31. The light fixture of  claim 13 , wherein the cumulative light output comprises an intensity from 10,000 lumens to 74,468 lumens, and wherein the light fixture is configured to operate based on a drive current comprising a current from 700 mA to 1000 mA. 
     
     
       32. A light fixture comprising:
 a plurality of LEDs that provide a cumulative light output comprising an intensity of greater than or equal to 10,000 lumens and a color rendering index (CRI) of at least 94, the plurality of LEDs comprising two or more strings of LEDs, the two or more strings of LEDs comprising a first string of LEDs and a second string of LEDs connected in parallel with the first string of LEDs;   a first current control device connected in series with the first string of LEDs that provides a drive current comprising at least 700 mA to the plurality of LEDs;   a second current control device connected in series with the second string of LEDs and configured to control the drive current provided to the plurality of LEDs;   a first voltage measurement device coupled to the first string of LEDs and the second string of LEDs, the first voltage measurement device coupled to the first current control device and configured to control the first current control device; and   a second voltage measurement device coupled to the first string of LEDs and the second string of LEDs, the second voltage measurement device coupled to the second current control device and configured to control the second current control device.   
     
     
       33. The light fixture of claim 32, wherein the cumulative light output comprises an intensity from 10,000 lumens to 74,468 lumens. 
     
     
       34. The light fixture of claim 32, wherein the drive current comprises from 700 mA to 1000 mA. 
     
     
       35. The light fixture of claim 32, wherein the cumulative light output comprises a total radiant flux from 30,900 mW to 41,600 mW. 
     
     
       36. The light fixture of claim 32, wherein the cumulative light output comprises a color temperature of greater than or equal to 4000° K. 
     
     
       37. The light fixture of claim 32, wherein the cumulative light output comprises a color temperature of greater than or equal to 5000° K. 
     
     
       38. The light fixture of claim 32, wherein the cumulative light output comprises an intensity from 10,000 lumens to 74,468 lumens, and the drive current comprises a current from 700 mA to 1000 mA. 
     
     
       39. A light fixture comprising:
 a plurality of LEDs configured to output a cumulative light output, the plurality of LEDs comprising two or more strings of LEDs, the two or more strings of LEDs comprising a first string of LEDs and a second string of LEDs connected in parallel with the first string of LEDs;   a first current control device connected in series with the first string of LEDs and configured to control a drive current provided to the plurality of LEDs, wherein the drive current comprises at least 700 mA;   a second current control device connected in series with the second string of LEDs and configured to control the drive current provided to the plurality of LEDs;   a first voltage measurement device coupled to the first string of LEDs and the second string of LEDs, the first voltage measurement device coupled to the first current control device and configured to control the first current control device; and   a second voltage measurement device coupled to the first string of LEDs and the second string of LEDs, the second voltage measurement device coupled to the second current control device and configured to control the second current control device, wherein the cumulative light output comprises an intensity of greater than or equal to 10,000 lumens and a color rendering index (CRI) of at least 90.   
     
     
       40. The light fixture of claim 39, wherein at least two of the two or more strings of LEDs comprise different color LEDs. 
     
     
       41. The light fixture of claim 40, wherein at least one of the strings comprises a Blue Shifted Yellow String and at least one of the strings comprises a Red String. 
     
     
       42. The light fixture of claim 40, wherein each of the strings comprises a Blue Shifted Yellow String with a different color temperature. 
     
     
       43. The light fixture of claim 39, wherein each of the first and second current control devices comprise: a Bipolar Junction Transistor (BJT); a MOSFET; a junction gate field-effect transistor (JFET); or an insulated gate field effect transistor (IGFET). 
     
     
       44. The light fixture of claim 43, wherein each of the first and second voltage measurement devices comprise: a comparator and an op-amp. 
     
     
       45. The light fixture of claim 39, further comprising a third string of LEDs connected in series with the first and second string of LEDs. 
     
     
       46. The light fixture of claim 39, further comprising:
 a pulse generator;   an RC circuit coupled to the pulse generator; and   a third current control device coupled to the RC circuit, the third current control device configured to vary the voltage measured by the second voltage measurement device.   
     
     
       47. The light fixture of claim 39, further comprising:
 a plurality of heat-sink-mounted LED array modules, each module engaging an LED-adjacent surface of a heat-sink base for transfer of heat from the module;   a heat-sink heat-dissipating surface extending away from the modules;   at least one venting aperture through the heat-sink base to provide air ingress to the heat-dissipating surfaces adjacent to the aperture.   
     
     
       48. The light fixture of claim 39, further comprising:
 a housing and an LED assembly secured with respect thereto and open to permit air/water-flow over the LED assembly, the LED assembly comprising:   an LED-array;   an extruded heat sink that has a base and heat-transfer surfaces extending from the base, wherein the heat-transfer surfaces are surfaces of a plurality of fins extending away from the base in a first direction, the fins including first and second fins along the opposite edges of the base, the first and second edge-adjacent fins also extending from the base in a second direction opposite to the first direction.   
     
     
       49. The light fixture of claim 39, wherein the cumulative light output comprises an intensity from 10,000 lumens to 74,468 lumens. 
     
     
       50. The light fixture of claim 39, wherein the light fixture is configured to operate based on a drive current comprising a current from 700 mA to 1000 mA. 
     
     
       51. The light fixture of claim 39, wherein the cumulative light output comprises a total radiant flux from 30,900 mW to 41,600 mW. 
     
     
       52. The light fixture of claim 39, wherein the cumulative light output comprises a color temperature from 4000° K to 5000° K. 
     
     
       53. The light fixture of claim 39, wherein the cumulative light output comprises an intensity from 10,000 lumens to 74,468 lumens, and wherein the light fixture is configured to operate based on a drive current comprising a current from 700 mA to 1000 mA. 
     
     
       54. A light fixture comprising:
 a plurality of LEDs configured to output a cumulative light output at an efficiency, the plurality of LEDs comprising two or more strings of LEDs, the two or more strings of LEDs comprising a first string of LEDs and a second string of LEDs connected in parallel with the first string of LEDs;   a first current control device connected in series with the first string of LEDs and configured to control a drive current provided to the plurality of LEDs, wherein the drive current comprises at least 700 mA;   a second current control device connected in series with the second string of LEDs and configured to control the drive current provided to the plurality of LEDs;   a first voltage measurement device coupled to the first string of LEDs and the second string of LEDs, the first voltage measurement device coupled to the first current control device and configured to control the first current control device; and   a second voltage measurement device coupled to the first string of LEDs and the second string of LEDs, the second voltage measurement device coupled to the second current control device and configured to control the second current control device, wherein the cumulative light output comprises an intensity of greater than or equal to 10,000 lumens and a color rendering index (CRI) of at least 90.   
     
     
       55. The light fixture of claim 54, wherein each of the first and second current control devices comprise: a Bipolar Junction Transistor (BJT); a MOSFET; a junction gate field-effect transistor (JFET); or an insulated gate field effect transistor (IGFET). 
     
     
       56. The light fixture of claim 55, wherein each of the first and second voltage measurement devices comprise: a comparator and an op-amp. 
     
     
       57. The light fixture of claim 54, further comprising a third string of LEDs connected in series with the first and second string of LEDs. 
     
     
       58. The light fixture of claim 54, further comprising:
 a pulse generator;   an RC circuit coupled to the pulse generator; and   a third current control device coupled to the RC circuit, the third current control device configured to vary the voltage measured by the second voltage measurement device.   
     
     
       59. The light fixture of claim 54, further comprising:
 a plurality of heat-sink-mounted LED array modules, each module engaging an LED-adjacent surface of a heat-sink base for transfer of heat from the module;   a heat-sink heat-dissipating surfaces extending away from the modules;   at least one venting aperture through the heat-sink base to provide air ingress to the heat-dissipating surfaces adjacent to the aperture.   
     
     
       60. The light fixture of claim 54, further comprising:
 a housing and an LED assembly secured with respect thereto and open to permit air/water-flow over the LED assembly, the LED assembly comprising:   an LED-array;   an extruded heat sink that has a base and heat-transfer surface extending from the base, wherein the heat-transfer surfaces are surfaces of a plurality of fins extending away from the base in a first direction, the fins including first and second fins along the opposite edges of the base, the first and second edge-adjacent fins also extending from the base in a second direction opposite to the first direction.   
     
     
       61. The light fixture of claim 54, wherein, the cumulative light output comprises an intensity from 10,000 lumens to 74,468 lumens. 
     
     
       62. The light fixture of claim 54, wherein the light fixture is configured to operate based on a drive current comprising a current from 700 mA to 1000 mA. 
     
     
       63. The light fixture of claim 54, wherein the cumulative light output comprises a total radiant flux from 30,900 mW to 41,600 mW. 
     
     
       64. The light fixture of claim 54, wherein the cumulative light output comprises a color temperature from 4000° K to 5000° K. 
     
     
       65. The light fixture of claim 54, wherein the cumulative light output comprises an intensity from 10,000 lumens to 74,468 lumens, and wherein the light fixture is configured to operate based on a drive current comprising a current from 700 mA to 1000 mA. 
     
     
       66. A light fixture comprising:
 a plurality of LEDs that provide a cumulative light output comprising an intensity of greater than or equal to 10,000 lumens and a color rendering index (CRI) of at least 90, the plurality of LEDs comprising two or more strings of LEDs, the two or more strings of LEDs comprising a first string of LEDs and a second string of LEDs connected in parallel with the first string of LEDs;   a current source that provides a drive current comprising at least 700 mA to the plurality of LEDs;   a first current control device connected in series with the first string of LEDs;   a second current control device connected in series with the second string of LEDs;   a first voltage measurement device coupled to the first string of LEDs and the second string of LEDs, the first voltage measurement device coupled to the first current control device and configured to control the first current control device; and   a second voltage measurement device coupled to the first string of LEDs and the second string of LEDs, the second voltage measurement device coupled to the second current control device and configured to control the second current control device.   
     
     
       67. The light fixture of claim 66, wherein the cumulative light output comprises an intensity from 10,000 lumens to 74,468 lumens. 
     
     
       68. The light fixture of claim 66, wherein the drive current comprises from 700 mA to 1000 mA. 
     
     
       69. The light fixture of claim 66, wherein the cumulative light output comprises a total radiant flux from 30,900 mW to 41,600 mW. 
     
     
       70. The light fixture of claim 66, wherein the cumulative light output comprises a color temperature of greater than or equal to 4000° K. 
     
     
       71. The light fixture of claim 66, wherein the cumulative light output comprises a color temperature of greater than or equal to 5000° K. 
     
     
       72. The light fixture of claim 66, wherein the cumulative light output comprises an intensity from 10,000 lumens to 74,468 lumens, and the drive current comprises a current from 700 mA to 1000 mA.