condition mean min max 0 h after light 4.02708 3.95745 4.09671 4 h after light 6.5303249999999995 6.20296 6.85769 8 h after light 9.210809999999999 9.08509 9.33653 4 h after dark 7.43294 7.4296 7.43628 8 h after dark 7.001725 6.5925 7.41095 12 h after dark 4.37856 3.39717 5.35995