1,Steel back side, mirro aluminum reflector. have 4*18W 2*36W 3*36W, 2, can be with high quality inductive ballast, start fast, no noise and long life time. 3, can be electronic ballast, energy saving,no flash. 4,fine out apperance, plastic powder painting, no harm to human health. 5,CE Certificater approved. 6. LOUVER FITTING PRODUCTS TECHNICAL DESCRIPTIONPOWER SUPPLY: 220V/240V 50/60hzLight distribution: directLuminance control: CIBSE LG3 CAT-2Protection class: class 1-earthing requiredLamp rating: T8 18W/36W T5 14W/28WIP: IP20MaterialHousing body: 0.40mm steel, white power coated.Attachment: 0.32 mirro aluminum reflectorlouver fitting(grille lamps,louver fluorescent fixture,lighting)