These can range anywhere from 2 to 3 hours in length.

The fire rating usually ranges from 15 minutes up to 3 hours.

Tours range from two hours to a full day, $45 to $95.

The races range in length from 6 to 36 hours.

Bulbs typically cost $300 to $400, and estimates of life generally range from 1,500 to 3,000 hours.

Dancers receive training once or twice a week, each ranging from 1-2 hours.

The working day could range from 10 to 16 hours for six days a week.

Each had its own cycle of light and dark, which ranged from seven hours to six months.

The half life in adults ranges from 3.5-6 hours and varies with age.

The interval between eruptions range from 8 hours to one day during the summer.