Interesting. My Wolf Warrior has a 15 watt light and I actually did a little range test in which I rode the same distance with the light on and with the lights off to see if my battery drainage would impacted. To my surprise, the battery drainage was impacted by about a 3 volt difference! So, I concluded that the lighting actually has the potential to reduce the actual range whenever they remain on. Mind you, I only used the head lights in my test without turning the side lower deck lights on which also include the brake and front tube lights. With my Dualtron X2, I find it a great benefit for extended range that I actually have an extra battery in my steering column which powers my lights.