Carmanah's rugged, self-contained solar obstruction lights are perfect for marking blue flags and other railyard obstructions. Designed to withstand the harshest environments, Carmanah's solar lights are trusted worldwide for improving the safety of railyards, and construction sites of all types. All components including solar panels, batteries, and LEDs, are housed in a single compact unit, making installation quick and easy. Visit our booth to find out how you can get an OL2A for FREE!