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LED lighting

A light emitting diode (LED) is a semiconductor device that can radiate an emission in a bright color with high efficiency even though its size is small. Light emitting diodes are well known solid state light sources. LEDs have many advantages over traditional lighting sources such as incandescent bulbs as they are cheaper to produce, more robust, and require less power. LEDs are more efficient than bulbs at converting electricity into light. LEDs are also durable and immune to filament breakage due to shock or vibration. LED lightings are especially desirable as they emit light with high power efficiency over specific colors in the spectrum. Lighting systems based on LEDs can be controlled to vary both their color and brightness. Through an appropriate combination of these two parameters, subtle lighting effects such as sunrise, sunset, and mood lighting can be achieved. In addition, LED lamps produce directional light. As a result, the light from the LEDs can be directed or manipulated by merely selective positioning or orienting of the LEDs. Hence, the various optical devices associated with incandescent light sources, such as reflectors and optical lenses, can be optionally simplified and even eliminated, saving material costs and assembly time. Light emitting diodes have found commercial success in many requirements for light sources including individual signal or indicator lights and in arrays of multiple LEDs for both indoor and outdoor signal and indicator lighting applications. LEDs are being used as replacements for ordinary light bulbs as, for example, in automobile brake lights and traffic lights. LED's provide numerous advantages including compactness and efficient conversion of electrical energy to light. LED lighting modules are becoming more common in many applications for replacing less efficient incandescent lamps. Depending on the amount of light required in the application, the LED lighting modules may consist of a plurality LED's arranged in parallel or in series, or a combination of both. Large arrays of LEDs have also been developed for various types of graphic displays, including indoor and outdoor advertising and information displays as well as large scale video displays. Light of different colors, particularly the primary colors red, blue and green, can be combined in various proportions to generate light having a wide variety of colors, including white light. The intensity of light emitted by an LED can be varied by pulse width modulating (PWM) the power applied to the LED. The application of power to an LED or group of LEDs can be controlled by a PWM control signal generated by a microcontroller which can be programmed to control multiple groups of LEDs, each generating light of a different primary color.

LED lighting product listings

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