condition mean min max 4 h after light 317.873125 313.847441 321.898809 8 h after light 308.4090165 302.970592 313.847441 12 h after light 287.2751845 226.475597 348.074772 4 h after dark 348.574938 328.983123 368.166753 8 h after dark 230.8085375 197.535449 264.081626 12 h after dark 288.460413 288.460413 288.460413