This architectural drawing is a High-intensity obstruction light design in AutoCAD drawing, dwg file, and CAD file. Significant Obstruction When aeronautical research indicates that lights are necessary for the proper warning of an elevated structure, such as chimneys, cranes, buildings, bridges, high tension pylons, and other buildings, then lights should be employed to warn of their presence. For more details and information download the drawing file. Thank you for visiting our website cadbull.com.