condition mean min max 4 h after light 173.1208765 161.802698 184.439055 8 h after light 197.49853 181.871797 213.125263 12 h after light 141.3010235 108.216144 174.385903 4 h after dark 142.427186 125.406703 159.447669 8 h after dark 154.0817675 122.327138 185.836397 12 h after dark 111.30898 111.30898 111.30898