NSi Large Deep wallpacks have a die cast housing with powdercoat finish and a porcelain 4KV mogul socket assembly. Specular aluminum reflector. Heat and shock resistant borosilicate glass lens, silicone gasketing. Listed for wet location use. Excellent for security and perimeter lighting, tunnels and commercial and industrial applications. Large Deep wallpacks have an extra deep housing for better cooling and longer lasting components. Metal Halide lamp included.