So last night around 10:00 I covered up the clocks and proceeded to read. I had cleverly put my wristwatch in a sock and when I got tired. I hit the timer.
I know I laid in bed for a bit before drifting off.
When the morning came, I felt tired so I went back to sleep. I believe this happened two more times. At that point I felt well rested so I got up. When I checked the clock it was 5:45. The timer on my watch showed 3 hours 21 minutes.