condition mean min max 4 h after light 7.8199 7.59248 8.04732 8 h after light 5.978105 5.88468 6.07153 12 h after light 7.762255 7.27992 8.24459 4 h after dark 9.97206 9.66782 10.2763 8 h after dark 9.30866 8.9803 9.63702 12 h after dark 9.386524999999999 9.36958 9.40347