[dkersten]

> bed at 11pm, wake up at 630am

Interestingly, this is on a 90 minute boundary, so you should naturally be in a wakeful sleep state when you awake. I’ve found that 7.5 hours is best for me too, because 6 hours isn’t long enough and 9 hours is too long, so 7.5 is the sweet spot (and anything not on a sleep cycle boundary and I wake up very tired). 11pm also seems to be the best time for me to go to bed, although I’m naturally a night person, but if I have to work, going to bed later doesn’t leave me with enough time to get 7.5 hours and still make it to work.

So... I didn’t try a process like yours to find my optimal times, but mine seems to be quite similar to yours.

Having said that, I’m not a light sleeper in that some noise doesn’t bother me or wake me and I normally don’t have much trouble getting to sleep, but I do find I often wake up still tired. Its mostly solved by keeping a consistent sleep schedule and sticking to 7.5 hours.

[tarnith]

I've found the same, more than 7.5 or less and I wake up either feeling groggy or tired.