Hubbell Outdoor Lighting DDS100PL Cast aluminum heads protect electrical components Twistlock photo controls save energy with automatic on/off, adjusts with the seasons Long life hps lamp provides uniform lighting (rated 24,000 hrs.) pulse start for cold environments - white light (rated 10,000 hrs.) cfl for instant-on warmer climates - white light (rated 8-10,000Hrs) All units are 120V Arms are 1 1/4" pipe except on dd-70s wall mount