I believe that everyone walking on the street at night, when looking up at the stars, you should all see that at the top of the high-rise building, there will be a variety of white and red lights, flashing rhythmically. These lights, which decorate the night sky, are not used to decorate the starry sky, but have other functions.
Photographed on a snow-waiting southern night
These lights, located at the top of tall buildings, are called aviation obstacle lights. The Civil Aviation Administration stipulates that for buildings with a height of more than 45 meters, aviation barrier lights should be installed. And for different height zones, different lights need to be used, which makes us see these twinkling lights at night. The frequency of these lights blinking is required to be between 20 and 70 times according to the regulations.
Below is a table of aviation obstacle light heights,
To be more intuitive, you can also refer to the following figure,
Why install such aviation obstruction lights?
It's not developers doing it for aesthetics, it's about safety. With the opening up of the low-altitude field, in order to ensure the safety of helicopters and other aircraft. The installation of these obstacle lights transmits information to the flight pilot through the color, arrangement and frequency of the lights, assists in understanding the situation on the surface, and plans to adjust the flight path. To avoid the phenomenon of aircraft hitting high-rise buildings, such accidents will not only endanger the personal safety of pilots, but also threaten the safety of residents. Therefore, the installation of obstacle lights is to save lives.