The traditional lighting such as
incandescent bulbs, fluorescent lamps, etc., though popular, but all
the inevitable shortcomings. For example, although the cheap
incandescent bulbs, making simple, but heat, efficiency is poor, life
is short and easy to damage. Although the energy-saving fluorescent
than incandescent bulbs, there is a serious pollution problem of heavy
metal waste in today's energy demands and reduce carbon emissions under
the two have been inconsistent with the demand. In contrast,
environmentally friendly energy-saving high-efficiency white LED, has
become a much-anticipated product of the new century. White
light-emitting diode current efficiency of up to almost 100 lm / W, has
been far more than incandescent bulbs and 15 lm / W, and fluorescent
par, but the production cost is still high.
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