condition mean min max 4 h after light 23.5 23.5 23.5 8 h after light 15.15 10.7 19.6 12 h after light 9.149999999999999 7.6 10.7 4 h after dark 14.15 6.7 21.6 8 h after dark 9.4 8.0 10.8 12 h after dark 6.75 6.0 7.5