1. Replacement Part Numbers: Replaces 6472-841, 6472-857, 3LRK, 94-1552, UVL-3LRK-1 2. Compatibility: Compatible with Sundance spas manufactured 2012 and later; also compatible with Jacuzzi spas in the J-200, J-300, J-400, J-LX, and J-LXL series. 3. Easy Installation: Remove the screws, housing cover, and washer, then place the lamp back into the quartz tube. 4. Warning: When removing the lamp, do not pull the power cord end, as the connection is fragile. To prevent the lamp from not working due to power failure, it is best to remove the end without the power cord. 5. Please confirm the product model and compatible models before purchase. Replacement Part Numbers: 6472-841 6472-857 3LRK 94-1552 UVL-3LRK-1 For use in Sundance Spas from 2012+, and Jacuzzi Spa series J-200, J-300, J-400, J-LX. Instructions: To replace this lamp in your tub, first turn off the power and remove the bottom panel. Then replace the lamp in the appropriate housing. You do not need to drain the water from the tub; installation is very simple. The product's water management system kills 99.9% of waterborne pathogens in hot tubs, effectively protecting the water source. Hot tubs treated with antibacterial lamps require less concentration of chemicals for disinfection and provide the same level of safe, healthy, and clear water with a lower chemical load. With normal use, each lamp can last for one year, ensuring swimmer safety, clean, clear, algae-free, and bacteria-free water, all at an economical price. Replacement Part Numbers: 6472-841, 6472-857, 3LRK, 94-1552, UVL-3LRK-1. Package includes: 1 clear UV lamp.