condition mean min max 4 h after light 9.666315 9.27263 10.06 8 h after light 6.89847 6.505 7.29194 12 h after light 7.527105000000001 6.98346 8.07075 4 h after dark 8.486963333333334 7.41662 10.2007 8 h after dark 10.731436666666667 9.84461 11.5149 12 h after dark 8.59245 7.96103 9.65111