condition mean min max 4 h after light 1.84476 1.80494 1.88458 8 h after light 3.808335 3.65125 3.96542 12 h after light 6.35472 6.19471 6.51473 4 h after dark 8.574449999999999 7.98996 9.15894 8 h after dark 5.6615 5.52587 5.79713 12 h after dark 4.184835 4.06226 4.30741