Rich -
I have added lights to my F-16 1/6 - no problems with the sides of the intakes and the top of the tail. I have not added wingtip light.

I made a long drill bit from carbon tubing and a drill bit, then drilled through the tail and routed the wire through. On the intakes,
you just cut off the colored part of the orignal (glassfibre) light and put the light unit in there, then glue the clear glass over it.