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 0.0 0.0 0.0 4 h after dark 0.0325592 0.0 0.0651184 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0