6U Energy Saving Lamp 1.CE/EUP/ROHS certificate 2.High lumenios ... Material of the plastic housing: PBT 3. Testing& Lifetime: .Testing: 3000 times for on and off testing, Aging test, Twisting force testing,Lumen testing; ... holding the glass tube10.International certifications: ISO9001:2000,CE,ROHS;GS,CCC,QC, Energy Star etc. Why ... the longterm business together! energy saving lamp with CE/ROHS approved