condition mean min max 4 h after light 14.5214 12.8166 16.2262 8 h after light 15.6256 14.6433 16.6079 12 h after light 16.468899999999998 16.0215 16.9163 4 h after dark 17.149 15.6786 18.5256 8 h after dark 18.2482 17.7877 18.5927 12 h after dark 15.069 14.4041 15.7545