How much sleep do you need?

[sergiodaly]

Usually 5 to 6 and then after a few days like this I do one night of 10. The weird thing is that I don't sleep at night, I just get sleepy when the sun rises and then I sleep in the morning, I do this because I can, but it's not a conscious option, it's just the way my brain likes to work... At night I'm very active and focus and in day time I feel like I'm just working at 75%...