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Originally posted by sardion2000
Bah Florescent lights don't last long enough. LED lightbulbs are almost ready for the market, and they have a life expectancy of over 200,000 hours(around the same as a CRT television)
Originally posted by Disaster_Boy
I hate to sound stupid, or even ignorant, but what are the basic difference between flurecent and LED lights?
I think that if looking to save evergy, the light bulb is the last of our worries.
Originally posted by Omniscient
Yes, but what do light bulbs have to do with power saving...There are things that use WAY more energy than lightbulbs that are in common everyday homes...
* LEDs are capable of emitting lights of an intended color without the use of color filters that traditional lighting methods use.
* The shape of the LED package allows light to be focused. Incandescent and fluorescent sources often require an external reflector to collect light and direct it in a useable manner.
* LEDs are built inside solid cases that protect them, making them hard to break and extremely durable
* LEDs have an extremely long life span, twice longer than the best fluorescent bulbs and twenty times longer than the best incandescent bulbs.
Most typical LEDs are designed to operate with no more than 30-60 milliwatts of electrical power. Around 1999, commercial LEDs capable of continuous use at one watt of input power were introduced. These LEDs used much larger semiconductor die sizes to handle the large power input. As well, the semiconductor dies were mounted to metal slugs to allow for heat removal from the LED die. In 2002, 5-watt LEDs were available with efficiencies of 18-22 lumens per watt. It is projected that by 2005, 10-watt units will be available with efficiencies of 60 lumens per watt. These devices will produce about as much light as a common 50-watt incandescent bulb, and will facilitate use of LEDs for general illumination needs.
In September 2003 a new type of blue LED was demonstrated by the company Cree, Inc. to have 35% efficiency at 20 mA. This produced a commercially packaged white light having 65 lumens per watt at 20 mA, becoming the brightest white LED commercially available at the time.
Today, OLEDs operate at substantially lower efficiency than inorganic (crystaline) LEDs. The best efficiency of an OLED so far is about 10%. These promise to be much cheaper to fabricate than inorganic LEDs, and large arrays of them can be deposited on a screen using simple printing methods to create a color graphic display so there are compensating benefits
rather otherworldly if you see them in person!