LED - Light Emitting Diode are electronic devices that produce light when an electrical current is applied. Unlike incandescent lamps, LED’s don’t use heat to produce light which make them much more efficient and have a longer operation life expectancy.
A single lamp may consist of multiple LED’s to produce the right level of light output. All LED’s require supply at the correct DC voltage and current levels, this device is commonly called a driver. Mains rated LED fittings have a driver built into the lamp, ensuring that the LED’s receives the right current and voltage supply for correct operation.