LSE Lighting 5W UV Bulb for AquaTop IL5UV In-Line R5WUV-SQ Brand: LSE Lighting Base Type: G23; Wattage: 5 watt Length Overall: 4" This UV Bulb by LSE Lighting is 100% compatible for AquaTop IL5UV In-Line R5WUV-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.