condition mean min max 4 h after light 0.5516225 0.444486 0.658759 8 h after light 1.28342 1.11511 1.45173 12 h after light 1.46036 1.32977 1.59095 4 h after dark 2.200345 1.75707 2.64362 8 h after dark 0.994983 0.973526 1.01644 12 h after dark 0.8017445 0.562179 1.04131