Denver International Airport is retrofitting more than 5,400 lights located in the airport’s east and west parking garages with energy-efficient LED fixtures. The majority of the lights are being replaced with 51-watt LEDs. Combined with other lighting systems in the project, DIA expects a net energy savings of about 45 percent, resulting in energy cost savings of about $327,000 per year. The project also qualifies for Xcel Energy’s Lighting Efficiency rebate program. The LED light fixtures will be assembled locally by Denver-based Cooper Lighting.