| CPC F21K 9/278 (2016.08) [F21K 9/27 (2016.08); F21K 9/272 (2016.08); F21S 10/02 (2013.01); F21S 10/023 (2013.01); F21V 3/02 (2013.01); F21V 23/04 (2013.01); H02M 1/12 (2013.01); H02M 7/53803 (2013.01); H05B 45/10 (2020.01); H05K 13/00 (2013.01); F21W 2131/406 (2013.01); F21Y 2103/10 (2016.08); F21Y 2105/10 (2016.08); F21Y 2113/10 (2016.08); F21Y 2115/10 (2016.08)] | 19 Claims |
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1. An LED light system configured for providing broad-spectrum white light suitable for a commercial image recording, in a form factor of a fluorescent light tube lamp, the LED light system comprising:
a. a housing having ends and including a support structure in a form of an elongated and narrow surface having a top side and a bottom side;
b. a plurality of first LEDs mounted on the top side of the support structure and configured to emit broad-spectrum white light in a first predetermined Kelvin temperature range of cool white light;
c. a plurality of second LEDs mounted on the top side of the support structure and configured to emit broad-spectrum white light in a second predetermined Kelvin temperature range of warm white light;
d. circuitry mounted to the support structure including an LED driver circuit configured for driving (i) the first LEDs, to provide light in the first predetermined Kelvin temperature range; or (ii) the second LEDs, to provide light in the second predetermined Kelvin temperature range, wherein the first and second predetermined Kelvin temperature ranges are nonoverlapping, and including a printed circuit board mounted to the support structure for carrying electrical power from a connection to the LED driver circuit and then to the first and second LEDs;
e. an elongate cover extending substantially a length of the support structure and covering the top side of the support structure for diffusing light emitted by the first and second LEDs;
f. wherein the housing and cover together have an elongate linear form factor, and the housing has a cross-sectional dimension of no greater than about 41 mm;
g. wherein the LED light system is configured for receiving input power to be provided to the LED driver circuit to selectively light the first or second LEDs,
h. wherein the first and second LEDs are disposed in a plurality of rows distributed along the length of the top side of the support structure to emit light, when selectively lit by the LED driver circuit, along the length of the top side of the support structure,
i. wherein the light is diffused by the cover and is suitable for the commercial image recording both when the emitted light from the LED light system is in the first temperature range of cool white light and when the emitted light from the LED light system is in the second temperature range of warm white light,
j. wherein the light emitted from the LED light system is suitable for the commercial image recording when said emitted light:
(i) is broad-spectrum white light having a color deviation corresponding to less than five points of green and less than five points of magenta (5M, 5G) of color compensation (CC), and
(ii) has a color rendering index of light emitted from each of the first LEDs or each of the second LEDs, whichever respective plurality of first or second LEDs is lit, that is greater than 92; and
k. wherein the housing has a length of at least about four feet and wherein the LED light system further comprises a power supply configured to provide at least 42 watts, and wherein the LED driver is configured to selectively drive the first LEDs with at least 42 watts and the second LEDs with at least 42 watts, and
wherein the first and second LEDs are phosphor-based light emitters.
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