condition mean min max 4 h after light 170.4 170.4 170.4 8 h after light 121.65 109.8 133.5 12 h after light 160.8 157.9 163.7 4 h after dark 134.05 107.2 160.9 8 h after dark 165.95 128.5 203.4 12 h after dark 97.55 96.0 99.1