Original ClearGuard - Replacement 18W Ultraviolet Bulb / Lamp with Square base has been discontinued by the manufacturer and no longer available. If you have the New Style Lamp with the 4 pins in a row on the base, please order at  18 Watt UV Bulb for Clearguard 5.5-8 #SUP15628

Product Information:

• Includes the 1 x 18 Watt UV Lamp with Square base