condition mean min max 0 h after light 5.455115 5.10419 5.80604 4 h after light 2.81759 2.65613 2.97905 8 h after light 2.91106 2.77418 3.04794 4 h after dark 4.955965 4.77129 5.14064 8 h after dark 6.56266 6.53512 6.5902 12 h after dark 4.74971 4.47033 5.02909