1 As brown sugar contains some amount of water, it has a slightly lower caloric value by weight than white sugar: calorific value per teaspoon is 11 kcal for raw sugar, 16 kcal for white sugar.  Because of the presence of molasses in raw sugar, it has a distinct flavor that is missing in white sugar.
For example, in general: 1  Infants require about 14-15 hours a day. 2  Teenagers need about 8.5-9.5 hours on average. 3  Most adults need 7 to 9 hours a night for the best amount of sleep, although some people may need as few as 6 hours or as many as 10 hours of sleep each day.
REM sleep occurs at intervals of one to two hours, and is variable in length. REM sleep is characterized by irregular breathing and heart rate, and involuntary muscle jerks. Most adults need around eight hours of sleep on a regular schedule to function well, although some require less, and others more. (It has been said that men need an hour less sleep than women.) Children, particularly teenagers, often need nine or ten hours for optimal functioning.