condition mean min max 0 h after light 6.485315 6.35981 6.61082 4 h after light 7.18219 6.88001 7.48437 8 h after light 10.014 9.2396 10.7884 4 h after dark 8.933264999999999 8.34771 9.51882 8 h after dark 8.169025000000001 7.29523 9.04282 12 h after dark 7.49195 7.12445 7.85945