I got this “less sleep needed” -thing after all,too. One month in keto now.
Been here before but now it only came after I started experimenting with calorie deficit. I´m on low carbs ( 5-15g ) and high fat ( +75% ). 1500 - 1800 kcals for a week now. Sleep went somewhere.
I´m just playing around with a calorie calc app, trying to find out what I really need. It looks like 1800 is good. I don´t feel hardly any hunger with these low carbs.
I´m waking up 2-3 AM. I fall asleep well at 10 PM and my sleep is good. But 2-3 AM I just wake up BING! Sometimes melatonin helps but it seems to make sure that the night is short. I used to sleep until 7 AM just a month ago.
I know from experience that his will change to longer nights over time. I wish it was summer, we have daylight from 10 AM to 3 PM now… can´t do much outside with all these extra hours.