condition mean min max 4 h after light 16.7 16.7 16.7 8 h after light 41.35 13.8 68.9 12 h after light 5.4 4.5 6.3 4 h after dark 4.75 2.5 7.0 8 h after dark 5.2 2.0 8.4 12 h after dark 7.65 2.9 12.4