condition mean min max 4 h after light 6.07454 5.72548 6.44651 8 h after light 6.649436666666667 6.38136 7.109210000000001 12 h after light 5.70039 5.59103 5.76419 4 h after dark 6.50552 6.35568 6.768669999999999 8 h after dark 6.19811 6.0043 6.34667 12 h after dark 6.228996666666666 5.7472199999999996 6.693339999999999