Patent ID: 8922058

Claim:
An LED lighting control system for establishing and maintaining a constant LED output across of plurality of series connected LED power supplies, comprising: a at least one LED light source comprising at least one diode; and a first switch mode power supply controller associated with said at least one LED light source, comprising: a low voltage programmable current source comprising: an adjusting element for adjusting the current from said first switch mode power supply controller to said at least one first LED light source, wherein the adjusting element fixes the current at a level for producing a predefined brightness from said at least one LED light source; a first communication port for receiving a communication from an external device or another switch mode power supply controller, wherein the external device is external to the first switch mode power supply controller; and a second communication port for relaying the communication to another switch mode power supply controller for outputting an essentially constant light level output across a system of switch mode power supply controllers connected in series.