condition mean min max 4 h after light 6699.300666666667 6409.378000000001 7143.81 8 h after light 8068.754333333333 7423.103 9000.998 12 h after light 5293.696 3207.323 7205.592 16 h after light 11141.37 10613.06 12152.52 4 h after dark 7243.402333333333 6818.0830000000005 7552.931 8 h after dark 4633.011 3814.877 5325.8730000000005