Patent ID: 9557011
Date: 2017-01-31
CPC Classifications: F21K,F21S,F21V,F21Y,H05B,Y02B

Claim:
1. An LED based lighting system, comprising: at least one light assembly comprising a plurality of LED chips; a controller configured to receive an input signal and to provide a control signal for controlling the at least one light assembly; an ambient light sensor that senses an amount of ambient light and provides an ambient light sensor output signal as a function of an amount of sensed ambient light; and a power supply module configured to receive a standard voltage and current signal, to convert the standard voltage and current signal to a DC voltage signal for powering the controller and to provide a power signal to the at least one light assembly to power the at least one light assembly in response to the control signal; wherein the controller is responsive to the ambient light sensor output signal and is configured to compare the ambient light sensor output signal with a plurality of threshold levels and to provide the control signal to control the light level provided by the at least one light assembly to reduce the amount of light output from a maximum light level to a reduced light level in a plurality of steps in response to the amount of sensed ambient light.