condition mean min max 4 h after light 7.989353333333334 7.92195 8.106860000000001 8 h after light 7.65982 7.5839300000000005 7.79034 12 h after light 8.223843333333335 7.7591600000000005 8.59407 4 h after dark 8.273596666666666 8.02435 8.525789999999999 8 h after dark 8.3131 8.08532 8.65302 12 h after dark 8.234746666666666 8.019110000000001 8.35464