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As of 2005, there were fewer than 100 cases of sighted people with non-24 reported in the scientific literature.
In 2002 Uchiyama et al. examined five sighted non-24 patients who showed, during the study, a sleep–wake cycle averaging 25.12 hours.
I never get more than 3-4 hours a night.
I do okay on it.
Excluding sex - I also get only about 3,4 or 5 hours sleep.
