condition mean min max 4 h after light 6.6 6.6 6.6 8 h after light 12.35 2.5 22.2 12 h after light 11.75 0.9 22.6 4 h after dark 6.300000000000001 5.2 7.4 8 h after dark 17.95 3.3 32.6 12 h after dark 11.8 4.6 19.0