condition mean min max 4 h after light 9.3866575 8.933253 9.840062 8 h after light 9.5245165 9.440406 9.608627 12 h after light 9.9855805 9.440406 10.530755 4 h after dark 9.0466975 8.652989 9.440406 8 h after dark 8.1345635 7.63095 8.638177 12 h after dark 8.784185 8.784185 8.784185