Patent ID: 8773284

Claim:
A lighting device including: an electric road flare having a circuit assembly supported in a housing, said housing configured for disposition on a roadway; said circuit assembly comprising an LED light source, a power supply and a power controller, said power controller varying a power to said LED light source from said power supply; and said light source perceived as continuously emitting a light varying according to a waveform of intensity versus time, wherein said waveform is predetermined by said power controller, and the waveform comprises a plurality of perceived substantially steady intensity light zones and a plurality of perceived varying intensity light zones, each perceived substantially steady light intensity zone of said plurality of perceived substantially steady intensity light zones having a perceived intensity lower than an intensity of each perceived varying intensity zone of said plurality of perceived varying intensity light zones, and each of said plurality of perceived substantially steady intensity light zones having a dwell time exceeding ten times a dwell time of each perceived varying intensity light zone of said plurality of perceived varying intensity light zones, whereby said road flare upon being placed on a roadway about a hazard alerts a driver to the hazard and continuously guides him about the hazard.