condition mean min max 4 h after light 4.552666666666666 4.46282 4.648219999999999 8 h after light 4.50164 4.408530000000001 4.6363199999999996 12 h after light 4.46863 4.29648 4.69388 4 h after dark 4.62305 4.45275 4.7289900000000005 8 h after dark 4.446823333333334 4.35046 4.57301 12 h after dark 4.408953333333334 4.36559 4.46282