condition mean min max 0 h after light 3.01842 0.0 6.03684 2 h after light 0.0 0.0 0.0 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 12 h after light 2.81606 0.0 5.63212 2 h after dark 6.025045 5.77322 6.27687 4 h after dark 0.0 0.0 0.0 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0