Lighting Fixture Explosionproof Type Protection : Exd IIB Class temperature : T4 Protection Degree : IP54 Implementing the standard: GB3836.1-2000, GB3836.2-2000, IEC60079 Explosion grade : WF1 Lamp holder : E27, E40 Optional : With junction box, With ballast, With bracket 30/ 90 Degree, Pendant, Ceiling, Handle Light source power: Incandescent lamp, Metal halide Hi-pressure mercury lamp, Hi-pressure sodium lamp.