condition mean min max 4 h after light 140.9 140.9 140.9 8 h after light 119.6 113.2 126.0 12 h after light 140.15 93.3 187.0 4 h after dark 138.7 113.8 163.6 8 h after dark 97.65 72.6 122.7 12 h after dark 66.65 64.7 68.6