LED Ceiling Light 1,ISO,CE,RoHS,TUV,GS,UL certificate ParameterValuePower ... 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 working life of the light.•We use no-imaging secondary optical lens of high light transmittance, making the lamp's ...