No. If you have to ask such a question, the answer is no. 6 hours is not enough, if you have to ask it. (192,000 people a year google “is 6 hours of sleep enough” , just in the US) 7 hours is not enough, if you have to ask the question. (144,000 people a year google “is 7 hours of sleep enough”, just in the US) At 5 hours or...