Compatible: Sundancee-spas Hot Tub Spas Water cleaner System 2012+, Jacuzzii-spas series J-200, J-300 , J-400, J-LX 6472-841, 6472-857, 3LRK, 94-1552, UVL-3LRK-1 Compatible: Also known as part numbers: 6472-841, 6472-857, 3LRK, 94-1552, UVL-3LRK-1 Packing: You will get 2 Bulb with Gasket and Connector. For better performance, Suggest replace the bulb every year. Help to reduce reparing cost Easy to Install: The light bulb is installed in the hot tub, remove the screws, enclosure cover and gasket in place, slide the replacement bulb back inside the quartz tube, SO EASY!