Image provided by Denver International AirportA rendering shows the planned design for a lighted welcome sign that Denver International Airport is installing along Peña Boulevard. The sign uses a 1,000-foot ribbon formed by dynamic LED-lighted poles and screens. The Denver City Council on Monday night approved contract revisions doubling to $14.5 million the amount Denver International Airport will spend to install and operate a lighted welcome sign. DIA’s original contribution to the installation along Peña Boulevard, as of last December, was $7 million.