condition mean min max 0 h after light 0.7336944999999999 0.549658 0.917731 4 h after light 1.8622699999999999 1.6258 2.09874 8 h after light 2.0202999999999998 1.60899 2.43161 4 h after dark 1.917445 1.66702 2.16787 8 h after dark 1.26922 1.08269 1.45575 12 h after dark 1.1462745 0.574499 1.71805