I need a 120 volt lighting product that I can install in a wall cut out. This cove is the depth of a 3.5" wall plus rock, 4" total depth to finished wall, 18" wide, 26" tall. We want to put some type of accent fixture in this cove, but of course the Junk at the box store is not rated for inside a wall. We need to recess the light in the top of the cove in an effort to make the fixture disappear. And of course the top of this cove is a half moon in shape (round) and the bottom of the cove is a shelf for a vase. Any ideas would be greatly appreciated.