This Zetlight Qmaven Q6-90 170W LED 34.6" Reef Aquarium Light is a 3rd generation Zetlight Qmaven Light. It has a higher wattage and eight different LED colors (only five in the previous version). This Qmaven Light can be operated using the free Horizon app. The Horizon app allows users to customize the light’s power, daily schedules, and much more. In addition, the Horizon app is compatible with a wide range of other Zetlight skimmers, wavemakers, and dosing pumps.