How many hours do you sleep?

8-10 on most days.
But could be as little as 3 sometimes :(

I use internet too much

You sleep at work?

PS. Nice edit reason!

The duration of sleep. Scientists have answered the question about how much sleep you need: the average period of sleep should be 7-8 hours. However, healthy sleep — uninterrupted sleep. Useful to sleep 6 hours than 8 hours with revivals. Therefore, the data of the who on this issue are expanding the boundaries of healthy sleep: an adult to normal functioning, you must sleep 6 to 8 hours a day.

How dangerous lack of sleep??

So, we found that a person needs to sleep 6-8 hours a day. Now let's see what can cause lack of sleep — disorder of the sleep duration. If a NAP is included in the system, we are faced with dangerous phenomenon of chronic lack of sleep. The habit of many today is a short sleep during the week. At the weekend the same person supposedly compensates for lack of sleep sleep up to 12-13 hours a day. Alas, this not only restores, but also degrades the picture. This phenomenon doctors gave the name of "sleep bulimia".
The consequences of sleep deprivation:
immunosuppression;
decreased performance, concentration, memory;
cardiovascular disease;
headaches;
obesity (the body, as if defensively, trying to make up for the lack of energy, extra calories);
in men due to lack of sleep decreases testosterone levels by 30% (starting to grow a belly even in slim men, there is a risk of inflammation of the prostate gland);
increased levels of the stress hormone cortisol;
can develop depression, insomnia;
The greatest danger of sleep deprivation is the disruption of normal biological rhythms of the body. During the day each organ and system has its own periods of activity and rest. Inside the body there are chemical reactions that are also dependent on biorhythms. Violation of sleep and wakefulness, duration of stay leads to a very serious internal disorders, the cause of which is desynchronosis. Unfortunately, the list of violations the consequence of which may be desynchronosis, is not limited to the above.
Up to a certain time to cope with the lack of sleep people can, changing your lifestyle will. However, over time, chronic lack of sleep may lead to sleep disorders, with which he himself can not cope.

I asked about the night sleep! 

Diamond it varies 4-8 hours

7 hours on a typical day