Patent ID: 7888883

Claim:
A lighting device comprising: a plurality of lighting sources comprising: a first lighting source, wherein said first lighting source emits light in a first illumination pattern; and a second lighting source, wherein said second lighting source emits light in a second illumination pattern that is different than said first illumination pattern, and said first and second illumination patterns at least partially overlap to yield a third illumination pattern; and a controller for controlling first and second intensities of said first and second illumination patterns, respectively, with respect to one another, wherein said third illumination pattern is altered when said controller alters said first and second intensities; and wherein said intensity of light emitted from said first and second lighting sources is altered by said controller substantially proportional to one another by controlling an electrical power supplied to said first and second lighting sources, such that a first electrical power supplied to said first lighting source is increased by a substantially equal amount with respect to a decrease in a second electrical power supplied to said second lighting source.