condition mean min max 4 h after light 2.6 2.6 2.6 8 h after light 4.5 3.5 5.5 12 h after light 5.0 3.5 6.5 4 h after dark 4.050000000000001 3.2 4.9 8 h after dark 5.4 5.4 5.4 12 h after dark 4.15 3.6 4.7