I installed 16 of these in our main living room, one of 3 different switches. Very easy to install and 2 spotlights landed right under the trusses. They fit with no problem. I recently ordered more for my garage, bedroom, hallway and bathroom. Candles are more than a year, no problems. I even had 4 headlights that had been sitting in a box in our garage for over a year. Pulled them out and they worked with no problems. i love these lights