condition mean min max 0 h after light 9.590655 9.02981 10.1515 2 h after light 5.90496 4.75194 7.05798 4 h after light 5.3964 4.98586 5.80694 8 h after light 6.478705 5.78411 7.1733 12 h after light 6.20362 5.16596 7.24128 2 h after dark 8.459735 7.70772 9.21175 4 h after dark 7.62146 6.78382 8.4591 8 h after dark 12.12555 11.7162 12.5349 12 h after dark 11.2097 10.92 11.4994