Patent ID: 8400061

Claim:
A lighting system for a transit vehicle, comprising: a plurality of LED-based lighting fixtures, each of said LED-based lighting fixtures comprising a plurality of light-emitting diodes (LEDs) collectively providing area lighting, and a slave node for controlling operation of the LEDs; a master node for controlling the slave nodes of the respective LED-based lighting fixtures and thereby controlling the operation of said LED-based lighting fixtures; a power bus interconnecting said master node and slave nodes; and a communication bus interconnecting said master node and slave nodes; wherein each of said slave nodes further comprises a voltage regulator for providing low voltage power to digital electronics including a slave node micro-controller; and wherein the slave node sets a target LED current level based upon a recorded age of the LEDs, and wherein the voltage regulator associated with that slave node adjusts the amount of current supplied to the LEDs of the LED-based lighting fixture according to the target current level.