Excellent product. As soon as I got it I used it for landscape lighting. I used it when replacing halogen bulbs for underwater lighting. I put a little grease on the o-rings and dipped the pins on the new halogen headlights in some grease before installing and the installation got better and easier. This is a wonderful product! I also dipped the T5 high beam bulbs in grease before replacing them. This prevents the ingress of moisture and pests and minimizes corrosion.