Go to your local hardware store and get some of the little black plastic plugs that are designed to fit in these holes. Most of those types of lights had a top piece designed to accept additional lights that could be directed in order to light up the far reaches of the gas pump island. There were some with no additional holes but the majority had these and a lot of the time, they had the very plugs that I'm talking about installed from the factory and they had to be removed to install additional lighting. When in place, the plugs are almost invisible from your viewing area on the ground and they seal the unit off from the weather! Now go get some plugs!!!----KEVIN
