Suitable for use with Sylvania Britespot or GE CMH PAR16 HID lamps. 78 Lumens per Watt allows compliance with the Building Regulations Approved document L2A/B requiring the use of energy efficient luminaires in commercial buildings. High output, energy efficient, compact metal halide reflector lamp for general lighting. Suitable for display lighting, shops, offices, showrooms, hotels, etc.. Non-dimmable. Electronic control gear not included . Please note: Metal-halide lamps have a warm-up/re-strike time >5minutes. Therefore these should be used in conjunction with other luminaires that will provide sufficient lighting until the metal-halides reach their full brightness.