UV water filter light replacements 1. Turn off the power of UV filter light ballets 2. Unplug the 3 pin plug from power point to make sure that this is fully isolated from power line 3. there in 2 end of UV light , one side end with power cable from ballast , another end close by metal fittings . 4. Do not touch the metal fittings end, it can damage the UV light fittings 5. Pull the power cable slowly to outside. 6. UV light will come out from its fittings 7. If needed pull the black plastic cover to see the UV light bulb connector 8. remove the old UV bulb from connector 9. completely Remove the UV light from the UV light filling 10. Install new UV light in the UV light barrel 11. Carefully connect the UV light to the connector 12. there is no polarity in the connector but have to insert it right way 13. push the UV bulb inside the barrel 14. push the black plastic inside the barrel 15. put the 3 pin power plug...