Sylvania HSI BriteLux Elliptical Quartz Metal Halide Lamps are available in 70 Watt, 250 Watt and 400 Watt clear and Coated. They offer excellent colour rendering CRI Ra. Protected versions an be used in open fittings whereas unprotected versions 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.