condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 12 h after light 0.0 0.0 0.0 4 h after dark 0.0 0.0 0.0 8 h after dark 8.769499999999999e-05 0.0 0.000263085 12 h after dark 0.0 0.0 0.0