This die cast aluminum, weatherproof, remote ballast box includes conduit access points and mounting tabs. It can be used with any fixture where remote ballast housing is needed: sign lights, landscape floods, etc. Ballast mounts on finned air-cooled pad for improved heat dissipation. Rated for 55 Deg. C ambient temperature. The overall length, (including the mounting tab) is 14 inches, the ballast housing is 10.75 inches . It has a maximum ballast wattage of 400 Watts MH/HPS. PLT adheres to the strictest quality control and quality assurance procedures in the ballast and lamp industry. Each PLT product is tested under the toughest conditions and meticulously factory checked for defects in materials to reach you in perfect condition.