The 15 Watt 18" Replacement UV Bulb single bulbs replacements for your favorite light traps. Fits in FlyTrap Professional 30W, Gardner GT180 Slimline, Gardner WS85 Wall Sconce, Luralite Pro, Mantis 1x2, Vector Classic, Vector Plasma One Fly Light, and Insect-A-Trap 30W Fruit Fly Trap. If you have different traps being used you have to flexibility of using the same size replacement bulbs (for any of the eight traps listed above).