condition mean min max 4 h after light 2.57859 2.41276 2.74442 8 h after light 2.775785 2.64615 2.90542 12 h after light 3.66425 3.51441 3.81409 4 h after dark 5.599035000000001 5.42135 5.77672 8 h after dark 3.13724 2.85674 3.41774 12 h after dark 3.38757 3.23462 3.54052