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Method for controlling the luminous flux spectrum of a lighting fixture

  • US 7,023,543 B2
  • Filed: 08/01/2002
  • Issued: 04/04/2006
  • Est. Priority Date: 08/01/2002
  • Status: Expired due to Term
First Claim
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1. A method for controlling the luminous flux spectrum of light produced by a lighting fixture of a kind incorporating a plurality of groups of light-emitting devices, each group emitting light having a distinct luminous flux spectrum subject to substantial initial variability, wherein the lighting fixture lacks a filter for substantially limiting the bandwidth of light emitted by any of the plurality of groups of light-emitting devices, the method comprising:

  • calibrating each of the plurality of groups of light-emitting device by measuring the initial flux magnitude or light emitted by the group, at a prescribed test temperature, in response to a predetermined electrical power input; and

    supplying a prescribed amount of electrical power to the light-emitting devices in each of the plurality of groups of devices, such that the groups of devices cooperate to emit light having a desired composite luminous flux spectrum.

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