condition mean min max 4 h after light 6.501905000000001 6.06076 6.94305 8 h after light 6.65923 6.49617 6.82229 12 h after light 7.889465 7.20833 8.5706 4 h after dark 9.126236666666667 8.04547 9.71603 8 h after dark 10.791233333333333 10.3021 11.5672 12 h after dark 8.879113333333333 8.23316 10.0202