Is it better to run the swg at 35% for say 6 hours or 100% for 2 hours? I don't know whether it turns on and off if it is at a lower setting or just lowers the power used? If it is "on" for the full 6 hours, then running at 35% seems a waste of its life. I know the life is based on run time so wanted to see how it works and therefore which is the better method to run it. I have an IC40.