condition mean min max 3 h after light 0.0 0.0 0.0 6 h after light 0.0 0.0 0.0 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 0.15359833333333334 0.0 0.460795 9 h after dark 0.2963423333333333 0.0 0.889027 12 h after dark 0.191263 0.0 0.573789