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 0.16523625 0.0 0.660945 3 h after dark 0.0 0.0 0.0 6 h after dark 0.24619 0.0 0.73857 9 h after dark 0.37248 0.0 1.11744 12 h after dark 0.0 0.0 0.0