Patent ID: 8310159
Filing Date: 2012-11-13
Classification: H05B,Y02B

Abstract:
1. A lighting circuit, comprising: a photosensor for detecting ambient light levels and for generating an ambient light signal comprising an indication of the level of ambient light; a relay disposed between a power source and a light source to selectively allow the power source to provide power to the light source; a photocontrol circuit electrically coupled to the relay and to the photosensor, the photocontrol circuit for: a fault detection circuit for monitoring for faults in the lighting circuit by comparing whether power should be provided to the light source based on the level of ambient light and whether power is actually being provided to the light source, wherein the ambient light signal comprises a voltage level indicative of the level of ambient light and the photocontrol circuit determines whether the level of ambient light is below an activation threshold by comparing the voltage level to a threshold voltage.