condition mean min max 4 h after light 6.351431333333333 5.1405970000000005 7.547204 8 h after light 6.280191666666666 4.89214 8.597976 12 h after light 8.215173 4.060619 11.999839999999999 16 h after light 18.21804 10.2878 27.31943 4 h after dark 6.967160333333333 3.5074379999999996 9.815471 8 h after dark 7.551633 6.526477 8.334961