condition mean min max 3 h after light 0.0 0.0 0.0 6 h after light 0.0132635 0.0 0.0397905 9 h after light 0.0 0.0 0.0 12 h after light 0.0 0.0 0.0 3 h after dark 0.0 0.0 0.0 6 h after dark 0.0 0.0 0.0 9 h after dark 0.011392933333333334 0.0 0.0341788 12 h after dark 0.0434758 0.0 0.0869516