Steel back with 0.45mm thinness, mirro aluminum materical 1.Steel back side, mirro aluminum reflector. have 2*36W 3*36W 4*18W 4*36W T8 Fluorescent tube.2.can be with high quality inductive ballast,start fast,no noise and long life time.3.can be electronic ballast,energy saving,no flash4.fine out apperance,plastic powder,no harm to human health.5.CE certificate approved.6.220V,50ZH-60Hz louver ...