This HID tubular metal halide light bulb offers an incredibly bright white light that can be used in closed luminaires in large commercial and industrial spaces.It is ideal for use in commercial floodlights.The 150W light bulb emits an outstanding 15400 lumens of cool white 4100K light. Its long 15,000 hour life rivals many equivalent LED floodlights. The light bulb has an ES-E27 Edison screw (27mm) cap and universal operating position, so is compatible with many standard fittings.This discharge light bulb provides up to ten hours of light per start, with a one minute warm up time. It requires an external ignitor. For more details, please see the manufacturer\'s website.Please note, this light bulb is not suitable for dimming.For use in closed luminaries. Universal operating position.