I give myself 8-hour window but analyze: should I experiment with different windows? Map the sleep window: current time in bed vs. time actually asleep. Calculate: what if I tested 7-hour window vs. 9-hour window for sleep efficiency? Show me the window experiment: try different windows, measure efficiency. Give me the optimization: this window gives best efficiency for me. Include: whether more time in bed is creating worse sleep, how to find optimal window, and when to adjust.