BN-LINK Outdoor 24-Hour Timer With Photocell Light Sensor turns outdoor lighting on and off at set times. The photoelectric eye senses the absence of daylight and automatically turns your lights on and then off after a set amount of hours, or at dawn according to the schedule you manually set. The light sensor timer has 7 options that repeat daily, on at dusk off at dawn, on at dusk and off after 2, 4, 6, or 8 hours, always on, or always off. Program this timer to turn your yard lights, patio or seasonal decorations on at a set schedule every day. This timer features durable, weatherproof construction, mechanical dial with 7-settings to choose from, 6 in. power cord, and is compatible with 3-wire plugs. The timer is compatible with compact fluorescent lighting (CFL) and LED bulbs. Avoid the hassle of going outside in the bitter cold to turn on or off your holiday lights; instead, manage your lighting preferences and enjoy the comfort of your home. The Century Timer brings simplicity to your life, by maximizing convenience, security and energy savings. If you have immediate questions about the application, installation, troubleshooting, or a damaged component, please email questions to Support@BN-LINK.com