Posts Tagged ‘LED’

Silicon-based LED Bulbs

Thursday, March 17th, 2011

If you are concerned with light efficiency at all, you know that LED bulbs are the future of lighting.  They are more efficient than both incandescents and CFL’s.  ESL bulbs are currently giving them a run for their money due to the high initial cost of LED’s, but Bridgelux thinks the new silicon- based LED bulbs they are working on will change that. read more »

Better Than CFL, Better Than LED…ESL

Friday, September 18th, 2009

esl bulbOver the past few years, the light bulb market has become more and more competitive as consumers want to spend less and less on electricity as the price per kilowatt hour rises.  I wish it were a more altruistic reason, but I digress.

CFL’s are the cheap alternative, and I don’t mean Canadian Football League.  They are relatively inexpensive, and have a good bulb lifespan at between 6,000 to 15,000 hours.  However, it produces a poor light quality, takes time to warm up, and is not fully dimmable, but the real detractor is that it contains mercury.

LED’s are thought to be the future of bulbs.  They have a longer bulb life at between 25,000 -100,000 hours, read more »

The Next Wireless Revolution – LEDs

Thursday, October 9th, 2008

LED technology is on the rise because of its economy, but there might be an additional reason to further the technology in the future. Boston University researchers are working on a cutting edge wireless technology that uses LEDs instead of radio frequencies in what is called a Smart Lighting system.

“Imagine if your computer, iPhone, TV, radio and thermostat could all communicate with you when you walked in a room just by flipping the wall light switch and without the usual cluster of wires,” said BU Engineering Professor Thomas Little. “This could be done with an LED-based communications network that also provides light – all over existing power lines with low power consumption, high reliability and no electromagnetic interference. Ultimately, the system is expected to be applicable from read more »

Toshiba Creates Brighter LED

Wednesday, October 1st, 2008

We all know that LEDs will probably replace most lights in the future, but the knock on them right now is that they just are not as bright as incandescents or CFLs.  In order to make the lights brighter, Toshiba has created an LED that has 50% higher UV light emission that will result in a brighter bulb compared to its predecessor.

The company hopes to use the technology to commercialize as early as 2010 LED lighting capable of replacing fluorescent lighting.

Today’s UV LEDs are not efficient enough for use in white LEDs, so such devices are now made by coating phosphors on a blue LED. However, because the red color component is weak, red objects look dark when illuminated under these kinds of white LEDs.

As a result, currently available white LEDs are not suited for lighting places like supermarkets and clothing stores.

Toshiba increased the efficiency of its UV LED by placing a thin layer of aluminum nitride between the sapphire substrate and the light-emitting layer of gallium nitride. This reduces boundary defects more than tenfold and helps prevent fissures that lower efficiency.

Toshiba’s prototype LED emits UV light in wavelengths of 383 nanometers. At a current of 20 milliamperes, the device emits light with a brightness of 23 milliwatts, compared with a maximum of 15 milliwatts for conventional UV LEDs.

Coated with green, red and blue phosphors, the UV LED generates white light.

via tradingmarkets

Viable LED That Screws Into Regular Socket

Tuesday, September 30th, 2008

Incandescent bulbs waste energy in the form of heat. They are also very fragile, and you have to replace them every so often. The next generation got better with CFL’s. They do not waste as much energy, and you don’t have to replace them as often. However, They are still very fragile, and while offering a longer life, there is the problem of mercury in the disposal of the bulb.

Well, a company called Lemnis Lighting has come out with an LED bulb that only uses 5 watts of power comared to a CFL that uses 8 and a incandescent using 43. It is agreed that the future of lighting is probably with the LED lights, but until the price of these bulbs goes down, it will have a hard time gaining traction in the general public as the lights are $40 a piece.