[whalesalad]

the engines don't put out a lot of radiant heat, especially at altitude where it is -50 outside. the lights on the other hand are putting out a metric fuck ton of heat directly at the illuminated area.

heat from an engine is directed straight out the back by nature of the turbines.

modern engines are also what are called "high bypass ratio" engines, where the outer ring of the engine (closest to the cladding) is really just air flowing by. the combustion area is smaller, in the center.