what is a good sleep actually

Generally, as people the older we get the less sleep we need. But I would say that 6-8 hours is usually a reasonable amount of time for the body to re-energize. So with minimum of 6 hours you should be ok.

I think an adult needs 6-8 hours sleep depending upon his physical activities.A child requires much more sleep.Sufficient sleep means you are not lethargic the next day.It may vary from person to person.

Yes, 6 hourssleep is sufficient in normal time. A good sleep is felt when one sleeps with out any disturbances,and with out any dreams.

How many hours per night should you sleep? NIH sleep experts believe you should be obtaining somewhere in the range of 7 to 8 hours of sleep a night. This figure varies considerably across the age span and from person to person. Still, if you're getting less than 6 hours of sleep per night regularly, chances are you're building up your "sleep debt," and may be compromising your health and welfare, sleep authorities contend. credits to : nih.gov

A good sleep means that you feel fresh and energetic after waking up from a deep and sound sleep of 6 to eight hours.

the minimum time as pe the who standards is 6hrs. however if you are not able to complete yur sleep you can go for a 8 hour sleep . but sleep without tensions in you r mind to avoid any hang over the next day.