2021 Upgraded Controller: Compared to the old version of the quartz timer. Our new controller time control is more precise. One month's error is only a few seconds. With 3 buttons 2 indicator lights, you can recognize more easier. . Auto ON or Off and Timing Function: Sondiko grow light comes with the ON or Off and Timing Function switch. Never worry about forgetting to turn on the light for your beloved plants when you are on vacation or away for weekend. . 4 Dimmable Levels: With premium(50,000 hours lifetime)LED bulbs(wavelength selection 420-800nm). Grow lights can provide any light of the your plant needed. More efficient than a simple red and blue light combination.You can adjust the brightness to 25 percent or 50 percent or 75 percent or 100 percent of the light as plant needed. . Easy to InstallandMultiple Uses: This grow light bar includes 3M adhesive and cable ties, 2 screws for three easy mounting options. A screwdriver is convenient for installation. Easy to install on your cabinet, shelf, wall and more. The length of this grow light is 13.2inch. It can be used on fruits, vegetables and a wide variety of other plants. Suitable for all stage of plants. . Best Service: We are a professional LED light manufacturer with advanced RandD and Sales department. If you have any problems, please feel free to contact us. We will provide you with the best service. .