My bike has a dynohub so it is generating electricity all the time. The front and rear lights are both LEDs so they are not going to wear out soon, even with daily use. The Lumotec headlight has a position for day running lights and I use it. It is clear that I am much moire noticeable to other traffic -- been a while since anyone ran a stop when I was entering an intersection.. I think it provides a safety benefit at no cost to me.