... 110V / 220V 3) Base: E39 /E40 Specifications:High Pressure Blended Mercury Reflector Lamp1) BHRF 300W, 500W, 750W2) ... maintenance cost3) Slight color temperature shift, high luminous efficacy (twice of theincandescent lamps)4 ... board ,workplaces, roads, vessels ports, cargo ports, publicplaces, outdoor and indoor places, community and sporting fields, flood lightingPacking: box and carton High Pressure ...