Cooper Lighting ED28 is a 7" ellipsoidal downlight for general lighting from a single vertically mounted ED23.5 high-pressure sodium or ED28 metal halide lamp. It has a medium or wide beam and is adjustable, locking into two positions providing different distributions. The lower shielding cone for metal halide has an integral glass lens providing lamp containment. An optional quartz standby lamp is available as a factory installed option. Magnetic ballast is ordered separately and installs rapidly to ballast bridge with electrical quick connects.