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The Eiko SP27/50K Spiral Fluorescent lamp (26/120V) is an Edison base (E26) screw-in bulb, for the SP Systems Cool Light, Interfit, Impact, Bowens Tri-Lite, or any other floodlight fixture that can accept a large bulb. The lamp has a color temperature of 5000° and an average life of 10,000 hours. This lamp is not for use with dimmers, electronic timers, photocells, totally enclosed fixtures, motion/occupancy sensors, or where directly exposed to water.