LED Ceiling Light 1,ISO,CE,RoHS,TUV,GS,UL certificate ... . It can save more than 50% of energy than high voltage sodium lamp and the working life is more than ... 10 years.•We use high heat conductive aluminium alloy as the body material which ... the light.•We use no-imaging secondary optical lens of high light transmittance, making the lamp's efficiency more than 90 ...