condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.1662935 0.0 0.332587 12 h after light 0.0 0.0 0.0 4 h after dark 0.0 0.0 0.0 8 h after dark 0.0883555 0.0 0.176711 12 h after dark 0.0 0.0 0.0