... lumen attenuation 4.CE&ROSH SMD led bulb, NEW led bulb light, led bulb lamp, led light bulb, led bulbs, led lamp bulb, high power led bulb, color changing led light ... management with internal copper heat conductor and external aluminum housing5. Light source: High power led 3W, ... : 50,000 hours 10. No UV or IR radiation enviromental protection SPECIFICATIONLED quantity60PCSPower6Wbeam angle> ...