These headlights are amazing! I used a 6" hole saw on my drill bit. Cut a hole in the drywall and the light just snaps into place. In just 5 minutes 2 lights were installed above the shower. Another 5 minutes to run the jumper to line them up with the to connect other lights in the bathroom. Very easy and seems like a great quality. Also they are dimmable! I've already ordered 2 more sets. Can't get enough, fantastic lights :)