Led Light Bulbs

Light-emitting diode, or LED, light bulbs were developed in the 1960s for use as indication lights. Early LED lights were available only in red, and the amount of light produced was minimal. However, recent advancements have developed LED light bulbs as a bright and very useful source of lighting. These lights are highly energy efficient, long lasting and purely electronic. In other words, LED lights produce very little waste that many lights produce, mostly in the form of heat.

LEDs are based on a polar mechanism; that is, there is a cathode (negative terminal) and an anode (positive terminal). The amount of light given off is not a result of voltage or wattage, but is instead based on the shape and curvature of the housing surrounding the lens. The wider the housing is, the tighter the focus, and therefore the brighter the beam. Therefore LED light bulbs are measured not by the light output, but by the radius of curvature, typically by millimeter.

Utilizing LED Light Bulbs Effectively

Though the best lights are expensive, the most common function of the LED is for its valuable utility. In fact, most traffic lights, previously using incandescent halogen bulbs, now use LED light bulbs for their energy efficiency and overall cost effectiveness. Although individual LED lights may be more expensive than normal incandescent lights, they last much longer, are five to six times less power consumptive than comparable incandescent, and are therefore cheaper to operate in the long run.

Besides being used for traffic lights, LED lights are also commonly seen in emergency exit signs, car lighting, and are highly effective as spot lighting--hikers and cavers, among other hobbyists consider LEDs to be extremely valuable lighting tools because of their ability to produce a long-lasting high beam.