condition mean min max 4 h after light 1.321404 0.701408 1.9414 8 h after light 1.6242 1.40575 1.84265 12 h after light 2.835 2.5205 3.1495 4 h after dark 2.617595 2.1701 3.06509 8 h after dark 4.047385 3.74276 4.35201 12 h after dark 2.153665 2.07926 2.22807