The USI Automatic Emergency Lighting System automatically turns on when the electric power shuts off. The system contains two long life 6 LED array flood lights. These lights do not use bulbs, making the fixture virtually maintenance free. Additionally, the self-charging battery allows the light to produce up to 48 hours of emergency flood lighting, making this an energy efficient option with a long life. Safety lights from USI also come with an AC power adaptor to keep it charged. The three-way switch includes 2 lights, 1 light, and off. Applications include basements, hallways, escape routes, garages, and near fuse boxes.