condition mean min max 0 h after light 0.0 0.0 0.0 4 h after light 0.0 0.0 0.0 8 h after light 0.154426 0.0 0.308852 4 h after dark 0.0 0.0 0.0 8 h after dark 0.3087515 0.307456 0.310047 12 h after dark 0.0 0.0 0.0