Originally Posted by
Jetsbest
It’s because they were once left “ON” and, when parked with the Air Bridge attached, the rubber weather shield caught fire because of the heat.
And hence using them for what they are not designed for, are they even rated for ground use without airflow for cooling? Or has no one thought of that for ground operations. And yes airframe manufacturers can easily overlook these sort of things as they don't see a problem until it is, that the light manufacturer probably has in a fine print list somewhere that it requires airflow or cooling during extended operation. Anyway, that will probably lead to them being LED and even more blinding.