Applied on tall structures for collision avoidance measures and airport runway safety Low intensity A type aviation obstruction lights are installed onto fixed objects that are less than 150m from the land or water surface(SAOL 2) Low intensity B type aviation obstruction lights are installed onto fixed objects that are less than 150m from the land or water surface(SAOL 3) Medium intensity A, B and C type aviation obstruction lights are installed onto objects higher than 45m within the Obstacle Restriction Area or higher than 150m outside the Obstacle Restriction Area(SAOL 4) LED light bulbs with increased lifetime decreases the replacement cost of the light source (LED lasts 25 times longer than a standard lamp bulb) For SAOL2 and SAOL3 type, can select between direct mount and pole mount type to fit your application needs Excellent durability from a selection of a polycarbonate or an aluminum housing structure Terminals located inside the housing for wiring (SAOL2/ SAOL3/ SAOL4) Built-in SUN switch available upon request which activates a system that automatically operates the product when darkness is detected