Timer Module for Beamswork or EVO Quad LED Aquarium Light Fixture DOES NOT work with Beamswork ET series light fixtures. Compatible with Beamswork EA, DA, DHL, EVO Quad, SE Quad, Green Element EVO models Auto on and off times for modes 1 and 2 Fixture must be pre-wired and have a time port on the side of the fixture. Convenient and easy to use.