A = consistent, good-quality patient-oriented evidence; B = inconsistent or limited-quality patient-oriented evidence; C = consensus, disease-oriented evidence, usual practice, expert opinion, or case series.
An LED driver is the power supply for an LED system, much like a ballast is to a fluorescent or HID lighting system, says Al Marble, manager - sales & market development for Philips-Advance Transformer.
Constant Current LED Drivers. 1  Delivering a fixed amount of current (often 350mA, 700mA or 1A) to your LED lights, a constant current driver allows your voltage to vary. 2  Delivering a fixed amount of current (often 350mA, 700mA or 1A) to your LED lights, a constant current driver allows your voltage to vary. The voltage requirements of your LED lighting system should fall within the minimum and maximum voltage range that each constant current LED driver specifies.