Ushio Colorlite ED17 150 Watt Medium Base Metal Halide Lamp features saturated color without the use of filters, ability to be used with standard metal halide ballasts, consistent color and high efficiency. Applications include theme parks, building facades, theatre and stage effects, recreation centers, bridges, gardens and parks, museums and galleries, shop windows, ballon lights, landscaping and aquascaping. Lamp should be switched off for at least 15 minutes per week.