condition mean min max 4 h after light 6.5666 6.20474 6.92846 8 h after light 6.616625 6.23343 6.99982 12 h after light 6.0634250000000005 5.8812 6.24565 4 h after dark 9.031013333333334 7.16853 10.5858 8 h after dark 9.796006666666667 7.91222 12.7526 12 h after dark 8.488876666666666 6.87481 10.3994