condition mean min max 4 h after light 315.4 315.4 315.4 8 h after light 229.65 191.7 267.6 12 h after light 254.4 254.3 254.5 4 h after dark 200.25 176.5 224.0 8 h after dark 206.8 195.6 218.0 12 h after dark 228.85000000000002 227.8 229.9