condition mean min max 4 h after light 5.2 5.2 5.2 8 h after light 8.25 6.5 10.0 12 h after light 8.8 6.5 11.1 4 h after dark 7.199999999999999 7.1 7.3 8 h after dark 7.1 6.2 8.0 12 h after dark 12.25 9.9 14.6