I am currently running an 18/6 schedule. The lights start at 10am and turn off at 4 am. However, here in the upper midwest usa it is quickly getting colder, especially at night. So I wanna change my schedule to start my lights at, say, 3pm and turn them off at 9am to keep the area warm at night and take advantage of the warmer day. Can I just one day start them at 3pm instead of 10am? Should I change it 1 hour every day? I'm guessing a gradual change is better, but hoping for some insight.