Patent ID: 7688002

Claim:
A control system for two or more serially connected LEE units, each LEE unit (i) comprising one or more LEEs and a unit activation module configured to control activation thereof in response to a respective unit activation control signal and (ii) being configured to emit light substantially in the same spectrum, the control system comprising: a control module operatively coupled to each said unit activation module and configured to generate each of said respective unit activation control signal based on a cooperative relationship between said LEE units so as to mitigate variations in operational characteristics between said LEEs units, wherein said cooperative relationship assessed from operational characteristics of said LEEs during an operation of the control system; a feedback system configured to sense an output of the LEE units such that the cooperative relationship is determined during the operation of the control system; and a converting module operatively coupled to said LEE units, said converting module adapted for connection to a source of power and configured to provide a drive current to said LEE units.