Patent ID: 7511437

Claim:
A lighting apparatus, comprising: at least a first load that includes at least one first LED-based light source; and a switching power supply including a first single switching stage for the first load, the switching power supply configured to provide power factor correction and a first load power to the first load via control of the first single switching stage, wherein the switching power supply further is configured to control the first single switching stage to provide the first load power without monitoring or regulating a first load current or a first load voltage associated with the first load, the switching power supply further comprising a rectifier configured to be coupled to an A.C. voltage source and provide as an output a rectified voltage waveform; and at least one controller configured to control first switching operations of the first single switching stage, wherein the first single switching stage comprises at least a first energy transfer arrangement configured to provide the first load power to the first load based on a periodic coupling of the rectified voltage waveform to the first energy transfer arrangement, and wherein the at least one controller is configured to control first switching operations of the first single switching stage to implement the periodic coupling of the rectified voltage waveform to the first energy transfer arrangement and the provision of the first load power to the first load.