This fits your. Make sure this fits by entering your model number. Wattage: 9W Base Type: G23 Bi-Pin Super Life of 12,000hrs This UV Bulb by LSE Lighting brand is 100% compatible with AquaTop CF-400UV CF-500UV Canister R9WUV-SQ All lamps listed are compatible brand UV products. We do not sell AquaTop brand lamps. All AquaTop brand names, trademarks and logos are property of AquaTop.