20-year lasting led light bulb introduced in us
Award-winning LED bulbs for 20 years are available today in the United States, a day known as Earth Day.
Light bulb switching-
LEDs provide pleasant naturelooking light.
The use of LEDs gives light a long life and a high price.
The price of the first version is $60.
However, media reports say the Dutch electronics giant Philips, the bulb maker, has reached a discount agreement with the store to sell the bulb for only $20.
The bulb won the Bright Tomorrow competition hosted by the US Department of Energy, which aims to find an alternative to energy conservation
Incandescent lamps in Watt.
The Department of Energy asked the company to develop a warm-light design similar to incandescent lamps, but it was more energy-efficient.
LED bulbs face competition for compact fluorescent lamps that are much less energy-efficient and cost-effective.
The United States and Europe have stopped production of 100-watt bulbs.
Europe has stopped producing 60-watt bulbs, and the United States is phasing out.
From 2014, incandescent lamps of 40 watts or more will be banned in the United States.