Fit aquarium tank from 12 inches to 23 inches with the adjustable metal brackets. lt is suitable for aquariums of various thickness and can be clipped to 25mm thick glass, Three lighting modes: Energy efficient and high quality LEDs. Touch control, two-way dimming, and brightness adjustable. The power adapter is 12V low voltage, safe and reliable. 5730 high-quality lamp beads, high power, high energy efficiency. Also has a long lasting performance, and it is beneficial to grow plants.