condition mean min max 4 h after light 1.6337350000000002 1.54305 1.72442 8 h after light 1.238139 0.724908 1.75137 12 h after light 1.7232815 0.788293 2.65827 4 h after dark 1.007888 0.794646 1.22113 8 h after dark 1.62345 1.60727 1.63963 12 h after dark 1.267047 0.821254 1.71284