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