Hancock County has decided to spend $1.7 million on upgrading the lighting at its airport in Trenton. Brad Madeira, manager of Hancock County-Bar Harbor Airport, said county commissioners approved the project Tuesday. The project will result in a new lighting system to illuminate the airport runways, taxiways and apron, replacing a system that was last upgraded in the late 1990s, he said. A key component of the upgrade will be installing underground conduit for the wiring.