condition mean min max 4 h after light 3.313725 2.881 3.74645 8 h after light 2.99066 2.64241 3.33891 12 h after light 6.38143 5.16322 7.59964 4 h after dark 5.827030000000001 4.9306 6.72346 8 h after dark 7.19144 6.65744 7.72544 12 h after dark 6.08461 5.85478 6.31444