This is exactly what I needed to replace open recessed outdoor lighting. My neighbors smoke outside like chimneys all day, and it blew into the exposed trim and seeped into my walls and subfloor. This may not stop it completely, but it will alleviate the problem. I used an LED lamp (incandescent bulbs might be too hot but I don't know) under this cover as it is an enclosed design. This cover is well sealed and fits well, fitting flush to the ceiling. It couldn't be easier to install. I'm so happy I found this; the price was very agreeable; looks better than the old open finish; and it should also prevent mistakes. The finish looks like metal so it can rust over time, but it's designed for the shower so hopefully it doesn't happen too soon. Even if it is, the cost is low, so I wouldn't think twice about replacing it with another one.