For me it gets mixed up a lot just because I work full time. When I get home from work I light them up and burn for 3 to 4 hours and then they are out until I get home the next night. But on the weekends I do a couple power burns because I am home. I light them up in the morning for about 6 hours and then let them sit for about 3 hours and then light them up again until I go to bed. I am not sure if that is the right way or if there is even a right way. But I think it would be close to how a customer would burn them.