Runwaylights /airport lights only show when close to runway?

[Mikeguy2 0]

Hey , Well this isnt really a big issue but im just wondering if there are ways to improve this . So the runway lights on flytampa corfu airport only show if im zoom in A LOT from a distance or if i get close. about a few miles. further than that and they are non existent. I believe this happens with every airport or at least with addon ones. its a pitty but i guess its not much of a problem. Its weird though because alll the orbx global lights are visible. its just the runway lights that arent. 
Any thoughts? thanks :) 

[Mikeguy2 0]

An extra note: I tested it on multiple airports and what i noticed is : In default airpots the runway lights can be seen from very far. So the problem is only with payware airports that i guess have their own lighting?