Patent ID: 7557521

Claim:
An apparatus, comprising: at least one first LED; at least one first power controller to provide a first controllably variable predetermined power to the at least one first LED without requiring any first feedback information associated with the at least one first LED; at least one second LED; and at least one second power controller configured to provide a second controllably variable predetermined power to the at least one second LED without requiring any second feedback information associated with the at least one second LED, wherein: the at least one first power controller includes a first single switch; a DC supply voltage provides a power source to the apparatus; the at least one first power controller is configured to apply a first converted DC voltage across the at least one first LED; and the at least one first power controller is further configured to control the first single switch to facilitate a first conversion of the DC supply voltage to the first converted DC voltage and concurrently provide the first controllably variable predetermined power to the at least one first LED.