I do not recall any fix for FT's KTPA and do not have issues with the rwy lights.
Have you added and tried adjusting the light scalar values for rwy lights in your FS9.cfg under [DISPLAY]?
RUNWAY_LIGHTS_SURFACE_SCALAR=0.7 //scales edge, center,end,touchdown,runways
RUNWAY_LIGHTS_VASI_SCALAR=0.7 //scales VASI/PAPI lights
RUNWAY_LIGHTS_APPROACH_SCALAR=1.0 //scales approach light bars
RUNWAY_LIGHTS_STROBE_SCALAR=1.0 //scales RAILs and ODALs
I have a GTX 1070 and use these values.
Increase or decrease the values to change light size. (Default values are 1.0 (100%).
Also you check out some of the HALO.bmp files in the library and see if any address the changes you desire. This is a trade off, though, as it effects lights for both scenery & aircraft.