Specifications:High Pressure Mercury Reflector Fluorescent Lamp 1) HRF 250W, 300W, 400W, 700W, 1000W 2) ... Base: E27, E39, E40 Specifications: High Pressure Mercury Reflector Fluorescent Lamp1) HRF 250W, 300W, 400W, 700W, 1000W 2) Base ... ) Slight color temperature shift, high luminous efficacy (twice of the incandescent lamps) 3) Long life span, the updated product of ...