Want a budget LED with sun rise and sun set function? Now you can buy Hinterfeld's smart controller and convert your normal LED (must use with constant voltage transformer) into a programmable LED light. Suitable for use with LED's under 36 V and 100 W. Features8 programs, set 8 different light intensity at 8 different time during the day. Real time display. 0-100% adjustment on each setting. Built-in clock - you can set intensity change at your preferred time. Power disconnected memory - your setting will remain in the device even if the power is disconnected, and it will resume the setting once you connect the power again. Easy to use, simply take the controller out from box, and connect it between the LED light and the AC/DC adapter. Changes intensity linearly over time and imitates real sunrise and sunset. Connector: DC5.5 (you need to make sure your fitting is using this connector). Area of Use Planted Tanks and Fish Tanks - Simulate sunrise and sunset for the day. Arowana (Dragon Fish) Tanks - Can leave 1-3% moon light through the night, less stress on fish and less chance of self injury. Cooling fan - Can be programmed according to time of day and change in temperature DC water pump - Can control a DC circulating pump to simulate different water currents Instructions ON/OFF Short press to turn on and off Long press to go into clock setting, use +/- to adjust hour and mins, then press Menu to exit MIN/L+ Increase intensity HOUR/L- Decrease intensity MODE To enter programming mode, press and hold for 3 seconds The display will flash between NO-1 and the current time, press + and - to adjust Press mode again for brightness setting, press + and - to adjust Press mode again and the display will flash between NO-2 and the current time, press + and - to adjust Press mode again for brightness setting, press + and - to adjust Press mode again to enter the next timed program setting etc. up to 8 programs Caution: If display shows "--:--" it mean the setting is not recognized Display L00*/Time rotate - it is working at that particular setting AUTO/Time rotate - it is running the programs automatically (the device default is AUTO, it goes into AUTO mode once turned on)