Patent ID: 7233115

Claim:
A network, comprising: a distributed DC voltage to provide a power source to the network; at least first and second apparatus coupled to the distributed DC voltage, each of the first and second apparatus including: at least one first LED configured to generate first radiation having a first spectrum; and a first feed-forward driver coupled to the at least one first LED and configured to control a first intensity of the first radiation without monitoring or regulating a first voltage or a first current provided to the at least one first LED, the first feed-forward driver comprising at least one energy transfer element to store input energy derived from the power source and to provide output energy to the at least one first LED and at least one switch coupled to the at least one energy transfer element to control at least the input energy stored to the at least one energy transfer element; and at least one network controller, coupled to each of the first and second apparatus, to generate at least one radiation control signal that includes information representing the first intensity of the first radiation generated by each of the first and second apparatus.