The development of LED light technology has caused their efficiency and light output to rise exponentially, with a doubling occurring about every 36 months since the 1960s, in a way similar to Moore's law. The advances are generally attributed to the parallel development of other semiconductor technologies and advances in optics and material science. This trend is normally called Haitz's Law after Dr. Roland Haitz.
In February 2008, 300 lumens of visible light per watt luminous efficacy (not per electrical watt) and warm-light emission was achieved by using nanocrystals.
LEDs multiply
You don't yet see general-purpose LED tube light bulbs at the supermarket or corner hardware store, but more products in the popular 60-watt-equivalent category are coming, and prices are expected to continue falling. In the space of the last few weeks, a couple of new LED companies have emerged, and one anticipated product (well, anticipated by lighting geeks at least) is expected in stores soon.
CHICAGO, IL--(Marketwire - May 2, 2011) - The World's Most Refreshing Beer continues to out-cold itself, as Coors Light packaging now features a new design that tells you when your beer reaches the "peak of refreshment." As part of its upcoming Super Cold Summer, the brand is debuting the latest in cold-activated technology: New Coors Light Two-Stage Activation bottles and cans, which make it easy to see when your Coors Light goes from cold... to Super Cold.
Switch Lighting, backed by venture capital firm VantagePoint Capital Partners, plans in the fourth quarter to start selling an LED bulb which has a cooling system that it says will ensure long life--on the order of 20,000 hours, or 18 years, at three hours a day. The company is readying 40-watt, 60-watt, and 75-watt equivalent bulbs, with prices starting at less than $20, according to a representative. To make light dispersal more even, the LED light sources--small coin-size dots--are located near the edge of the bulb glass, a change from the typical "snowcone" shape.
Not to be confused with HID Lights, LED Lights are completely different. Though both are the latest in the market of new age lighting options, they have stark differences that make them both unique and beneficial for consumers. LEDs can and will be used in your everyday life before you know it; in some cases already are. Here is a little history lesson in LED Lights, what they do and where you might start noticing them. LED light bulbs will be very important in the future and are so already. LED lighting is leading the way in the ‘greener’ style of living. As you notice more and more people using LED light bulbs, you can answer you own question of, ‘ What exactly is an LED light ?
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