Burtons Submersible UVs are an extremely versatile and effective. Available from 10w to 80w. Please check the chart to see which UV is suited to which Burtons drum filter. Comes complete with UV tube, quartz sleeve and power pack. Can be installed in a variety of applications including our Drum filters. Bulb life of up to 10,000 hours. High purity Quartz allowing for maximum transfer of UV light. Intelligent electronic ballasts. 80 watt unit come with a Burtons UV weather box Model Number Wattage Length Recommended Pond size (Gallons) BA-UV-10W 10 watt 410mm 1,500 BA-UV-20W 20 watt 470mm 3,000 BA-UV-30W 30 watt 650mm 4,500 BA-UV-40W 40 watt 870mm 6,000 BA-UV-80W 80 watt 870mm 10,000 Stock subject to Burtons availability.