Sunlite 05160-su ful18t6/bl 18 watt ful 4-pin single u-shaped twin tube 4-pin base, black light the sunlite black light plugin emits a black light. This black light bulb is used for bug lamps, and other sort of produce that attract bugs. features: shape: plt average life hours: 10000 wattage: 18 package quantity: 25.