Lightmap quality is a percentage, so max is 100 as rolfy noted above.
Those pink pipes are the biggest eyesore regarding normals problems, so maybe they just have no smoothing ?
The present lightmapper is not the greatest regarding any curved surfaces and FPSC in general seems to have limited smoothing support, but I cannot say if that is just a .x problem, as I am not a lover of the file format.
I used to map entire levels that were 10x the size of an FPSC level with gile[s] using between 3-4 lightmaps total (512 - 1024 res maps, so not huge things) for the entire map and get better results which is sad
Yet I still think those pipes just have zero smoothing, as I for one have never had that problem with LM Quality set so high in FPSC.