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.
LED Drivers. 1  At the heart of every LED lighting system is a specialized power supply called a driver. Just like fluorescent lights need ballasts to function properly, and low voltage lights need transformers, your LED lights need an LED driver. 2  At the heart of every LED lighting system is a specialized power supply called a driver.