Viparspectra 165W Aquarium Light Timer Control Series V165 LED Grow LightThe timer control series has been scientifically engineered for balancing coverage and PAR output. It is ideal for photosynthetic coral and helps acclimate new corals and tanks to the light by increasing exposure and intensity. With the dimmable feature, you can adjust different brightness channels individually. High speed, quiet fans, and upgraded aluminum heatsink allow easier heat dissipation. Internal Timer: You can turn the light on and off