Buildings with a height of more than 45 meters must be equipped with aviation obstruction lights. The aviation obstruction light is intended to identify the outline of the building and warn the flying aircraft so that the building will not become an obstacle to flying at low altitude.
Conventional 45 meters use low-intensity constant light red, work at night, use light B red within 105 meters, work at night, flashing. 105-150 meters in use A light white flashes. Use high light intensity above 150 meters.
a) L-810, low-power red obstruction light
b) L-856, high light intensity white flash obstruction light, 40 flashes per minute
c) L-857, high-intensity white flash obstruction light, 60 flash/min
d) L-864, medium-intensity red flash obstruction light, 20 flash/min - 40 flash/min
e) L-865, medium-intensity white flash obstruction light, 40 flashes per minute
f) L-866, medium-intensity white flash obstruction light, 60 flash/min
g) L-885, medium light red flash obstacle light, 60 flashes/minute