The Alzo 1243 is a 150 Watt High Efficiency Metal Halide Replacement Bulb for Alzo 2000 Lights. It consumes less than 150 watts of power and produce more 5300K daylight illumination than 800 watts of tungsten hot light. Bulb life is more than 7000 hours. These bulbs are double envelope, white opaque glass encased to soften the light and provide protection. Ultraviolet radiation of these bulbs at 1 meter is substantially less than mid day sunlight. Alzo HID bulb is not specified for use in any other light fixture.