Atra du evarinya ono varda.
I need my minimum 5-6 hours of sleep every night lols. I can run on little sleep, but my concentration/focus levels will be close to zero and I tend to doze off in lectures with little notice. >< My sleep cycle used to be really bad last year; I'd go to bed around 3-5 am and get up around 8 am for lectures, thanks to the internet. It's more or less fixed now, thank goodness xD