What is LED lamp?
A Light Emitting Diode lamp is a solid state lamp (SSL) that uses light-emitting diodes (LEDs) as the source of light. Since the light output of individual light-emitting diodes is small compared to incandescent and compact fluorescent lamps, multiple diodes are used together. LED lamps can be made interchangeable with other types, but the presently at a higher cost. Most LED lamps must also include internal circuits to operate from standard AC voltages. LED lamps offer long life and high efficiency, but initial costs are higher than for fluorescent lamps.