Sleeping Effectiveness

Sleeping and waking are part of our internal clock controlled by our brain.
How much sleep should a person get each night? The amount of sleep a person needs depends a lot on his or her age. As an example babies sleep about 14-15 hours, while older people need only 7-8 hours each night. Most kids between the ages of 5 and 12 years old somewhere in between need 10 to 11 hours of sleep. Some kids might need more and some need less.

For me, if I have work at night, by the time I get home I can't sleep right away. I'll get home around 7:10am but I won't be fall asleep until 8:30am because I have to relax myself and take a shower before going to bed. But, I'll be awake around 11am or noon, so I only have 3 1/2 hr of sleep. After doing some chores, and browsing online, I'll take a nap around 4-5pm then I won't get up up until 8:30pm to get ready myself, do some stuff here in the house and cook. By the time I'm done it will be almost time for work. So pretty much I have 7hrs of sleep though day time sleeping is different from night time sleeping, but day time is my night time since I am
awake all night.

According to what I read, skipping one night's sleep can make a person irritable and inept. Once a person misses two nights of sleep, that person will have problems thinking and doing things. That if you are also awake all day long, so your brain can no longer do their normal task as well. It says that, after five nights without sleep, a person will hallucinate. Eventually, it becomes impossible for the brain to give its directions to the rest of the body without sleep.