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.
Drivers are the piece of software that tells your computer how to talk to the specific hardware you have installed or connected to your computer. The drivers must be specific to the particular model of your computer or sound device, and are usually produced by the sound device or motherboard manufacturer.