The Hi-Tech Lamps part number F22T12/BL350-O is a 22 watt (22W) UVA blacklight lamp made by Osram. Used for Insect Trap, Fly Killer and Bug-Zapper units (Insect-O-Cutor Units). However, other applications include Industrial Processes and Special Effects. Blacklight Lamps differ from Standard Fluorescent Lamps only in the composition of the phosphur. This lamp has maximum overall length of 14.78in. It is a T12 bulb with two G13 medium bi-pin bases. This lamp is also known as Osram F15T12/350BL/500/PH and 21445.