Raleigh-Durham International Airport has received a $2.5 million state grant to help replace more than 2,000 runway and taxiway lights with light-emitting diodes, or LED fixtures.
The airport had previously received $4.5 million in federal stimulus money for the project, which will cost about $8.6 million.
The state grant, from the Department of Transportation, requires the airport to put up 10 percent of the grant's value for the work, or about $250,000. The RDU Airport Authority has applied for additional federal grants to cover the remaining $1.3 million.
Airport officials say the LED fixtures are easier to maintain and will reduce energy use by up to 60 percent compared to the conventional quartz fixtures they will replace. Work will begin in July and is scheduled to be completed in May 2010.