... self-ballasted mercury vapor lamp, External-oscillation Hg light, sodium lamp and metal halide lamp.FEATURES1. the ... plastic with properties of impact-withstanding and corrosion-proof.2. high efficient reflecting bowl.3. the ... switch, with the functions of good water-proof and dust-proof.6. use special tools when maintaining, so ... , GB12476.1-2000,IEC01241 standard request. Explosion-proof, Flash lights