The A II LED lights from Chihiros are specially designed for densely planted freshwater aquariums. The individual LEDs have a color temperature around 8,000 Kelvin & are arranged in 3 rows across the entire lamp to ensure a well-balanced illumination as to not cast any shadows. The LED are equipped with a built in Bluetooth controller. This differentiates the A II from the A Series, which requires an external device to change the spectrum. The app allows you to easily set the timer, light intensity, ramping time sunrise/sunset via "My Chihiros" app. Tank Size: 30 cm. Power 15W