... efficiency:90Lm/W 2.Lifetime:30000h lifespan 3.LED Chips:Epistar,Cree,Samsung 4.Certificate:CE Rohs High Power Led Bulb Light ... hrsLED Chip BrandEpistar,Cree,Samsung Features of led bulb:1. Light source: High quality SMD LED chip. 2. Long Lifespan: 40 times of ... is dimmable Applications of led bulb:1.High-class stores, super market, offices, hotel, meeting room,2.Multi-function hall, exhibition, ...