You have not said what sim.
I think your talking about the FS9 effect with in 2D cockpit mode at night with landing lights yes?
Please download V2.11 which minimizes these effect. (note does not do this Virtual cockpit mode)
You other comment
> runway lights display as vertical objects looking almost as they are a barrier!!
I dont know what you mean, can you please post a screen shot, so we can understand this effect
Note: Original thred is here:http://www.uk2000scenery.org/forum/index.php?topic=6193.0
in which I explained what I have done