condition mean min max 4 h after light 246.3 246.3 246.3 8 h after light 184.05 133.6 234.5 12 h after light 246.5 242.2 250.8 4 h after dark 242.55 167.4 317.7 8 h after dark 197.95 154.5 241.4 12 h after dark 199.55 171.6 227.5