condition mean min max 4 h after light 247.1 247.1 247.1 8 h after light 188.25 186.0 190.5 12 h after light 150.85 140.1 161.6 4 h after dark 98.7 92.5 104.9 8 h after dark 81.45 59.4 103.5 12 h after dark 124.6 84.8 164.4