condition mean min max 4 h after light 7.862783333333334 7.6814 7.961360000000001 8 h after light 9.121343333333334 9.00273 9.33535 12 h after light 8.425136666666667 8.22253 8.52661 4 h after dark 7.9425 7.70259 8.0847 8 h after dark 7.820209999999999 7.52388 8.06171 12 h after dark 7.091876666666666 6.942069999999999 7.19994