How many hours

How many hours do we need to sleep in order to and work well on the next day? I don't know. I read an article about it that and it said that told there isn't scientific consensus, because all people need a different quantity of hours to be fine function well the on next day,. However, but in the researchings research findings have shown that there are repeated ranges of hours, e.g., between 5-6 and 8-9 that... .

My experience had demonstrated revealed that me I need to sleep about 8 hours of sleep at night and take a power nap (of no more than of 30 minutes) during in the afternoon, I must take a power nap (of no more than of 30 minutes). As On the other hand, I have the noise of cars will be in my ears behind my head at 8:00 a.m. or even earlier before, then I must go to sleep at about midnight.

I didn't really understand the part about the 'repeated ranges of hours'. Did you mean that there were research findings that supported sleeping for 5-6 hours and 8-9 hours? Anyways, good job! :)