If you are the sort of person whose body wants to wake up 3 hours after sunrise...
Is that common? My model was that people vary mostly in how much morning light affects them, where at 100% it’s “wake up soon after it gets light” and at 0% it’s “sleep until you’re done sleeping regardless of light”? And in between you have things like “if it’s light when you mildly rouse from your second-to-last sleep cycle you have a large chance of fully rousing, and so get less sleep in expectation”.
Given how much outside light varies over the course of the year (sunrise at 5am in June, 7am in December), if you benefit from a visual indication of wake time blacking out the external light and replacing it with light under your control seems much better, if you can get it bright enough?
My model was that this is the thing going on for many night owls. I believe I had studies at one point that would back this up, but could not immediately find them.
if you benefit from a visual indication of wake time blacking out the external light and replacing it with light under your control seems much better, if you can get it bright enough?
I’m not in principle opposed. The approach you mention has super conceptual benefits under the model you and I share. In practice, I find my friends often have lights that go from zero to very bright very fast. I expect this to be more equivalent to an alarm clock than a subtle nudge to your sleep cycle mechanism to start moving towards wake-up-land.
Is that common? My model was that people vary mostly in how much morning light affects them, where at 100% it’s “wake up soon after it gets light” and at 0% it’s “sleep until you’re done sleeping regardless of light”? And in between you have things like “if it’s light when you mildly rouse from your second-to-last sleep cycle you have a large chance of fully rousing, and so get less sleep in expectation”.
Given how much outside light varies over the course of the year (sunrise at 5am in June, 7am in December), if you benefit from a visual indication of wake time blacking out the external light and replacing it with light under your control seems much better, if you can get it bright enough?
My model was that this is the thing going on for many night owls. I believe I had studies at one point that would back this up, but could not immediately find them.
I’m not in principle opposed. The approach you mention has super conceptual benefits under the model you and I share. In practice, I find my friends often have lights that go from zero to very bright very fast. I expect this to be more equivalent to an alarm clock than a subtle nudge to your sleep cycle mechanism to start moving towards wake-up-land.