Hygger 957 Planted Aquarium Light features programmable, gradual 24-hour light cycle settings (sunrise, midday, sunset and night), auto on and off, to create a optimal condition for your fish and aquatic plants | Build-in Timer - The lighting system enables a variety of features such as customizing the intensity and colors of the light, setting up daytime to nighttime schedules, mimics sunrise and sunset, color gradient loop, fine tune lighting schedule, auto on and off, memory function, and much more | Sunrise & Sunset Functions - enable the LEDs to be easily programmed to slowly turn on or off in 15-minute which prevents light shock to fish. The white daylight mode blends the white, red, green and blue LEDs together to produce bright light. Moonlight mode provides 6 single-colored ( red, purple, blue, cyan, green, yellow) and 10 levels dimmable options. One programmable preset can save customized color combinations and lighting | IP68 Water-Resistant Rating - No need to worry about splashes, or other accidental drops of water. Premium fully encased 1.2mm thick aluminum shell provides more effective heat transfer and protects the device from humidity and water intrusion. No fan. Low voltage DC adapter, safe to use, saving electric bill | The 12“ long freshwater aquarium LED fixture contains (20) 6500K White, (4) 450-455nm Blue, (4) 620-625nm Red, (2) 520-525nm Green, (10) RGB LED's. 927 lumens. 6500-10000K. This system has adjustable mounting legs which can be used in aquariums with widths between 12 and 17 inches