The A II LED lights from Chihiros are specially callibrated for planted aquariums. The LED are equipped with a built in Bluetooth controller. The app allows you to easily set the timer, light intensity, ramping time sunrise/sunset via “My Chihiros” app. With a width of 6.7cm & height of 1cm, these aquarium lights are slim in design, making them look sleek on your aquarium – focusing more on plants & livestock. The lights are attached to a transparent acrylic holder so no metal brackets or legs taking away from the beauty of your planted tank, also acting as an indirect heat sink. The A II features a swivel to adjust the light, giving the aquarist a wide range of options for illuminating an aquarium in any direction.