... energy conservation.2. Extra-long life-span,the semiconductor chip are give out light,there have no filament,no glass bubble,not ... to 50000 hours.3. Light is healthy,does not contain the ultraviolet ray and infrared ray in light,do not produce radiation(it ... high,fever heat small,90%’s electric energy changes into visible light;6. The needed voltage electric current are small, generating heat are ...