condition mean min max 4 h after light 1.7470750000000002 1.45096 2.04319 8 h after light 0.59643 0.584256 0.608604 12 h after light 0.688868 0.604711 0.773025 4 h after dark 1.71637 1.38843 2.04431 8 h after dark 4.443435 4.28549 4.60138 12 h after dark 2.65248 1.96587 3.33909