condition mean min max 0 h after light 9.30103 8.84967 9.75239 2 h after light 4.25842 3.96058 4.55626 4 h after light 4.20508 3.54175 4.86841 8 h after light 4.681710000000001 4.29928 5.06414 12 h after light 4.775 4.26002 5.28998 2 h after dark 6.406185 6.15443 6.65794 4 h after dark 8.355785 7.67524 9.03633 8 h after dark 10.770900000000001 10.7634 10.7784 12 h after dark 11.0408 10.2012 11.8804