It's been nearly a week since I stopped segmenting my sleep on purpose. I'm gearing up this weekend to start the 2nd half of my sleep experiment - the 30 hour cycle. Here is what's been going on:
I've been using electric lights. The sun goes down, the lights are already on. It took me about 2 days to go right back to the way I usually sleep - without so much as a though or a bit of effort. The only thing I miss about that is that I liked having the candlelight. It was sweet and it was relaxing. So I may just use candlelight sometimes when I need calm.
I've been naturally segmenting. Since I go to sleep somewhere between 11PM and 3AM, depending on what's going on, my natural wakefulness happens when it happens. For example, I got up in the middle of the night after having gone to bed at midnight - the time I woke was 5:38AM. I just woke up and sat on the end of the bed for a minute. I was hot, but that's all I really thought about. And I went back to bed. Last night, I went to bed around 1:30AM, and this morning about 7:15AM, I woke up for a good 20 minutes.
What will really be interesting, I think, is if I naturally segment during my 30 hour cycle. Keep up with me here, and anything could happen in slumber-land.