H ELECTRICITY
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H05 ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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H05B ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
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45/00 Circuit arrangements for operating light-emitting diodes [LED]
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H05B45/20 Controlling the colour of the light
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H05B45/24 using electrical feedback from LEDs or from LED modules
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