condition mean min max 0 h after light 15.9666 13.4461 18.4871 4 h after light 20.5153 19.2261 21.8045 8 h after light 5.468299999999999 5.13629 5.80031 4 h after dark 5.4841750000000005 4.72572 6.24263 8 h after dark 14.02365 13.4563 14.591 12 h after dark 17.66615 14.7203 20.612