I never turn over...however...if you are worried about it, a stand up bed is your best bet. Bulbs are more intense, so you don't have to spend so much time in there and no stripes at all. I work at my families tanning salon and have a lot of women who say they do flip because of the 'smile' which would be the lower back not getting as tan and under your buttcheeks. In most beds, the bulbs on the top are stronger do to the fact they have to produce more uv rays to get your body an even tan.