Dialight’s Vigilant Series L-856 High Intensity Strobe has been certified by the U.S. Federal Aviation Administration (FAA) for use on towers, smokestacks, and chimneys in excess of 500 feet tall. It’s the first of its kind to achieve FAA certification, and Dialight is the first ever to offer a complete line of all LED-based FAA-certified aircraft obstruction lighting, according to the company.