condition mean min max 0 h after light 2.263235 2.19667 2.3298 4 h after light 2.9503 2.79282 3.10778 8 h after light 2.13197 2.1016 2.16234 4 h after dark 3.28873 2.55736 4.0201 8 h after dark 2.62437 2.21182 3.03692 12 h after dark 1.692525 1.64005 1.745