In X-Plane the runway lights and taxiway lights donĀ“t illuminate anything. I think it it s a limitation to keep performance up - if someone with a very weak computer dials down all settings, he would still want to see those lights, without taking the penalty of calculating dynamic lighting.
The aircrafts landing lights seem to work, although their beam is focused "downwards" to illuminate the touchdownzone during approach, so they are usually angled down at about 6 degrees (depending on typical aircraft attitude during approach).
Take a picture when you are on the ramp at EDDF, for example, and see if the ramp illumination lights light up the environment and your aircraft.
Cheers, Jan