Patent ID: 11234304

Abstract:
A photocontrol circuit includes a set of light level detection circuitry which is powered by a 0 to 10V dimming input. In response to a determination that light sensed in ambient environment is at or below the light level threshold, the light level detection circuitry switches a 0 to 10V dimming input line to approximately 10V, controlling a luminaire to emit maximum light. In response to a determination that light sensed in ambient environment is above the light level threshold, the light level detection circuitry switches the 0 to 10V dimming input line to less than approximately 1 Volt, thereby controlling the luminaire to emit minimum or no light. The photocontrols embodiments described herein advantageously employ the 0 to 10V dimming line as the luminaire control line, and photocontrol power source, unlike previous photocontrols which typically switch the power input to the luminaire. The photocontrol circuit may be housed in a photocontrol module comprising a base and a cover.