Patent ID: 7788833

Claim:
A light source, comprising: a light emitting portion for projecting a beam of light to illuminate a surface, the light emitting portion consisting of a pair of first and second emitter means only, the first and second emitter means being of the same color, a control circuit for controlling the selective energization of each one of the first and second emitter means individually to form the beam of light to illuminate the surface, the first and second emitter means being arranged symmetrically about a center point of the light emitting portion, the control circuit for selectively energizing the first emitter means continuously alternatingly transitioning between a first intensity level and a second intensity level while the light source is energized without remaining at a constant intensity level, the control circuit for selectively energizing the second emitter means continuously alternatingly transitioning between the first level and the second level without remaining at a constant intensity level in an inverse manner relative to the transitioning of the first emitter means while the light source is energized so that the first and second emitter means provide substantially constant illumination on the surface for a user, and the control circuit for selectively energizing the first and second emitter means alternatingly repeatedly continuously in an inversely proportional manner at all times while the light source is energized to provide the appearance of motion of light along the beam to an observer while projecting a substantially constant steady light intensity on the surface to be illuminated.