They are designed for high light output at low amp draw. They offer years of reliable, virtually maintenance free service. Energy efficient, they are complemented by non-yellowing diffuser lenses, white prepainted finish, and attractive woodgrain trim. Standard fixtures have aluminum housings. They include standard fluorescent tubes powered by Thin-Lite's highly efficient DC electronic ballasts. The light uses 15 watts at 12 volts and produces 825 lumens. Dimensions: 18" x 4" x 1.375"