Everyone is different. There are some people who function perfectly well on 5 or 6 hours and some people who need 10 to be completely rested.
I personally need 7-8 hours a night of solid, restful sleep to be at my best, but I can function well on 4-5 hours for a really long period of time if I have to. Eventually though, it catches up to me and I have to crash for a weekend and regenerate.
Hi,
As for quality, you need to be in complete darkness for melatonin production to occur and for hormone levels to reset themselves. This even means the little LED on your TV! ANY form of light will stop this process from happening.
First off, the little LED will not stop this process from occurring or disrupt your circadian rhythm in general. That is just ridiculous.
Although we should ensure our bed time area is mostly (reasonably) absent of light, the level you are saying to take it is quite extreme.
A good timing for what?Sleeping at 11pm will be a good timing.