Aircraft have at least four types of aircraft (commercial aircraft normally have more) , a major function of these lights is to avoid collisions. The lights that all aircraft must have are landing lights , beacon lights, strobe lights, and position lights (also called navigation lights). Commercial aircraft normally have a bunch more external lights to aid pilots in taking off and landing.
External lights on aircraft are normally to illuminate areas that the pilots need to see (both the runway and the aircraft), to make the aircraft more visible to others (including other aircraft), and to provide illumination for other various purposes. Anti-collision lights on commercial aircraft Beacon or anti-collision lights Beacon lights (called anti-collision lights) are intended to show when the aircraft is in operation. In the past, they rotated (and so they are sometimes still called rotating beacon lights).
They flash both at the top and bottom of commercial aircraft. New aircraft use LED lights for beacon lights (these have a red flash that is noticeably longer than the older Xenon beacon lights). The beacon light is a slow flashing red light located on top of the tail and is part of the aircraft's collision avoidance measures.
Beacon lights are turned on before the aircraft's engine is started so that even on the ground at the airport. These indicate to the groundcrew that the aircraft's engines are about to start and that they should get away from the airplane. Beacon lights are.
