I don't think the lights should be destroyable per say (only maybe)... hear me out as to why.
They are just lights. They aren't anything physical but just a bitmap in space. What I think we're asking for are actual runway lamps. Like these ones:
http://www.airport-data.com/airport/photo/026603L.html
I'm in total support of those being destroyable as they are actually an object. Maybe you want the others destroyable as an option.