LED lamps represents a new generation of lighting technologies applied to general consumer goods. LEDs have effectively transformed the lighting landscape in a matter of a few decades, giving the average civilian access to a powerful, long-lasting light that produces less heat than conventional bulbs. In fact, LED lamps are slowly but surely replacing incandescent and fluorescent lamps in domestic and more demanding, industrial applications. Major advantages include their incredible longevity (years, sometimes decades) and their relatively conservative use of energy compared with other types of lights.
A single diode emits less light than a conventional bulb, which is why one LED bulb is usually comprised of a series of diodes for a cumulative luminescence equal to or greater than an incandescent or fluorescent bulb. Conveniently, these bulbs are designed to fit into the majority of lamps that use other types of bulbs.
LED lamps are ideal for home use, whether as an led night light, led desk lamp, led floor lamp, led nail lamp, led table lamp, led reading lamp or even outside of your house as an led street lamp. Most lamps are produced with domestic uses in mind, thus requiring white light. LEDs, however, work via electroluminescence, which is the phenomenon that causes certain alloy semiconductors to light up a given color when hit with an electrical current. None of the current alloys produce a clean white light and to do this requires either a “blending” or “converting” of different colors into white.
The blending method uses a series of LEDs that produce different colors, set up close to one another to emit broad-spectrum white light. The convenience of this method lay in the ability to calibrate each individual light to alter the quality of white light produced to suit multiple applications. The conversion method of producing white light with LEDs uses a phosphor in combination with a blue or UV LED. The phosphor absorbs some of the light and results in a white light. This is explained in great detail at led-growlights.net
These LED lamps are now rather widely available and run the gamut of power and price.