All of Aquascape's transformers are designed to be used with LED and Halogen fixtures. This 150 watt Transformer includes a Photocell which automatically turns lights on at dusk and off after 4, 6, or 8 hour intervals. Comes with 25 ft. of low-voltage lighting cable and does not need to be reset after power outages or daylight savings. Transformer comes with 3' power cord.