Osram Powerstar HQI T Tubular Quartz Metal Halide Lamps are available in 250 Watt, 400 Watt, 1000 Watt and 2000 Watt clear. They offer excellent colour rendering CRI Ra. These are restricted to closed fittings use only. Please take care when selecting for open fittings to ensure the lamp is designed for this. Many metal halide lamps are interchangeable but not all. If you are seeking a cheaper alternative to replace your existing lamp, please call us and we will be able to advise you on a compatible product.