... Ambient Humidity 10%~90% R.H. Operating Temperature -25°C~55°C Color Rendering Index ≥75 ... light source:warm white,neutral white,cool white3.LED Chips:Epistar,Cree,Edison,different chips with ... office,house,exhibition,museum,aisle,hall,etc Showroom LED Ceiling Lamp Features:1.Long life span2. ... stability5.No harmful emission6.Dimmable lighting system Showroom LED Ceiling Lamp Service:1.OEM or ODM ...