condition mean min max 0 h after light 105.987 105.137 106.837 4 h after light 9.845585 9.30527 10.3859 8 h after light 6.787675 4.61147 8.96388 4 h after dark 33.62715 30.4031 36.8512 8 h after dark 45.18605 43.1296 47.2425 12 h after dark 81.96575 53.8445 110.087