Patent ID: 7745769

Claim:
A system for adjusting the illumination of an interior space, comprising: a light source including a phosphor coating; said phosphor coating includes a residual glow; a lamp driver circuitry deposed to control said light source brightness; an illumination sensor disposed to detect an illumination of the interior space and provide an illumination signal; a color balance adjustment input disposed to provide a color balance adjustment signal; a processor disposed to receive said illumination signal, to receive said color balance adjustment signal, and to provide an output color selection signal; said processor provides an algorithm for generating a plurality of periodic short anti-bursts of generated light wherein during each anti-burst of generated light, said light source is momentarily, partially, and substantially dimmed for a period short enough to produce no visible flicker and for a period long enough to provide a portion where said residual glow detected by said illumination sensor is minimized; said anti-burst of generated light includes an end period defined by said portion; said processor measures said illumination signal only during said end period of anti-burst of generated light; said processor, in response to said illumination signal adjusts said output color selection signal; and said lamp driver circuitry, responsive to said output color selection signal adjusts said light source brightness.