The obstacle lights set up in a large building complex should be able to see the outline of the object from all directions, and the horizontal direction can also be referenced. The obstacle lights should be set up at a spacing of about 45 meters. Generally, buildings should install obstacle lights at the top of the building that are higher than 150 meters in height. High intensity A-type obstacle lights should be set up at the top of the building, and used in conjunction with medium intensity obstacle lights. Tall objects higher than 105 meters but less than 150 meters should be equipped with medium intensity A-type obstacle lights at the top, and obstacle lights should also be added in the middle layer, with the spacing as equal as possible. The ultra-high voltage transmission line tower should be equipped with high intensity B-type obstacle lights and three layers of synchronous flashing. The position is the lowest point of the tower top, the vertical line below the cable, or both.

For chimneys or other similar buildings, the top obstacle marker light should be located between 1.5 and 3 meters above the top. Considering the pollution of the chimney on the lighting fixtures, the obstacle marker light can be located 4 to 6 meters below the chimney opening. Ultra high objects above 150 meters should be used in conjunction with medium and high intensity aviation obstruction lights.