I bought these bulbs to replace the halogen bulbs in my 2005 SeaRay Sundancer. Halogen lamps in the cabin are connected to a 120V network. It will burn too hot! Seeing how hot DC halogen bulbs burn as they melt into the carpet for floor lighting. I also decided to replace the light bulbs on the side of the air conditioner. The bulbs appear to be of good quality and work better than existing halogen bulbs. I believe this is necessary to prevent a possible fire in the cabin due to the heat generated by the halogen bulbs. I have also tried other LED bulbs for this application. Don't waste your time! They work fine.