Landscape Lighting Specialist, Outdoor lighting Contractor Fairfax, Va - Interstate Irrigation and Lighting - Low Voltage Lighting specialist, high voltage lighting, accent lighting, deck lighting. Northern Virginia Lighting Specialist. Landscape lights, landscape lighting, outdoor lighting - We service the Northern Virginia area including, Falls Church, Alexandria, Sterling, Centreville, Fairfax, Arlington, Chantilly, Clifton, Herndon, Burke, Springfield, Lorton and Oakton Virginia VA