condition mean min max 4 h after light 4.503526666666667 4.46364 4.56163 8 h after light 4.5010900000000005 4.4131800000000005 4.6629 12 h after light 4.437286666666667 4.383430000000001 4.5429 4 h after dark 4.439343333333333 4.32169 4.56112 8 h after dark 4.2961833333333335 4.20819 4.37449 12 h after dark 4.48371 4.44356 4.55273