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This Topbulb FDF bulb with ANSI code FDF uses 500 watts and 120 volts. It has a R7S base, and an average rated life of 400 hours. It has a T3 lamp shape, and is a halogen bulb.
Cross Reference: Industry (Q500T3/4CL, JP120V-500WC7), Ushio (1000500.