condition mean min max 4 h after light 6.719765000000001 5.70607 7.73346 8 h after light 7.27314 6.9982 7.54808 12 h after light 8.16761 7.30736 9.02786 4 h after dark 11.0145 10.6365 11.2274 8 h after dark 11.707766666666666 10.9163 12.2523 12 h after dark 9.549896666666667 8.71065 10.8039