Iwasaki EYE Multi Super Ace and Multi Metal MF Elliptical Quartz Metal Halide Lamps are available in 250 Watt and 400 Watt coated. They offer excellent colour rendering CRI Ra and are available in an E40 GES Giant Screw cap. Please take care when selecting for open fittings to ensure the lamp is designed for this. These lamps offer a direct retrofit for an MBFU lamp. 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.