condition mean min max 4 h after light 8.508595 8.19846 8.81873 8 h after light 7.654415 7.49338 7.81545 12 h after light 10.2898 10.0553 10.5243 4 h after dark 8.647585 8.17782 9.11735 8 h after dark 8.044105 7.9617 8.12651 12 h after dark 8.329695000000001 8.13947 8.51992