condition mean min max 4 h after light 1.6 1.6 1.6 8 h after light 0.75 0.7 0.8 12 h after light 2.55 2.5 2.6 4 h after dark 12.049999999999999 1.2 22.9 8 h after dark 3.1500000000000004 1.1 5.2 12 h after dark 6.9 1.3 12.5