Brilliance The Black Diamond Directional Light is available without a lamp or with an MR16 Ecostar and is ready to install right out of the box. It includes a glass convex lens to prevent water build up. The spun brass construction features a black (BK) or bronze (BZ) baked enamel finish, and the design includes two O-rings to mitigate water and condensation intrusion. The directional light features an adjustment system, which allows for 25 points of articulation of the knuckle. A set screw secures the fixture’s cap so it does not come off when pointed down, and the knob makes it easy to find and adjust in low light.