I need roughly 5-6.5 to be productive the day though (though it's a bitch to raise me from sleep then, and I need like 4 watches in order to get up). If I do this the entire week I usually sleep 9-10 hours on the weekend.
For short bursts (2-4 days or so) I can do fine with around 3-4 hours of sleep, but then I need atleast 2 days to get back into working order.
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