A light-emitting-diode lamp is a solid-state lamp  that uses power  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 often used together. Power LED( light-emitting diodes) Lamp can be made interchangeable or retrotitled with other types. Power LED( light-emitting diodes) Lamp components use  DC  so Power LED( light-emitting diodes) Lamps must also include internal circuits to operate from standard  AC  voltage. LEDs are damaged by being run at elevated temperatures, therefore Power LED( light-emitting diodes) Lamps  typically include heat  management elements such as heat sinks  and cooling fins . LED lamps offer long  service life and high energy efficiency, but initial costs are higher than those of fluorescent lamps.

LED lamps are used for both general lighting and special purpose lighting. Where colored light is required, LEDs come in multiple colors, which are produced without the need for filters. This improves the energy efficiency over a white light source that generates all colors of light then discards some of the visible energy in a filter.

Compared to fluorescent bulbs, advantages claimed for LED light bulbs^.are that they do not contain mercury (unlike compact fluorescent light bulbs). that they turn on instantly, and that the lifetime is unaffected by cycling on and off, so that they are well suited for light fixtures where the bulbs are frequently turned on and off. Power LED( light-emitting diodes) Lamp are also less apt to break.

White-light light-emitting diode lamps have the characteristics of long life expectancy and relatively low energy consumption. The LED sources are compact, which gives flexibility in designing lighting fixtures and good control over the distribution of light with small reflectors or lenses. Due to the small size of LEDs, control of the spatial distribution of illumination is extremely flexible, and the light output and spatial distribution of a LED array can be controlled without efficiency loss.