... lifespan which will save the maintaining cost.4) Specific design for beam angle5) Self-protection system inside, which ensure the normal ... , which ensure the Lighting effect in case of the damage for single LEDs.7) No twinkle and noise, no Hg, Pb ... to install, dustproof, anti creeping APPLICATIONWidely used in store, hotel, hospital , conference room., showroom and Ad. light-fixture etc.