Generally, the battery startup voltage of the Solar Stud Reflector is 3.2V, 12V, etc. Here, we take 3.2V as an example, DC20W = voltage 3.2V*current 6.25A, that is, the actual power of the Solar Stud Reflector is 20W, and the system battery is 3.2V. Current 6.25A. With such a large current, the greater the conductor load, the thicker the wire required. Therefore, the wire of Solar Stud Reflector is thinner than that of ordinary household lamps.