I'll see what I can do. I redid LIGH drawing and similar stuff because it was a bit broken. CRAY(LIGH) could probably default to tmp2=55 (I think this is the default), as long as that is easy to do.
Edit: It will be slightly harder to fix than I thought, while allowing creating LIGH from Lua to work properly. It looks like maybe I copied some code from my mod, when create_part works slightly differently there. So i'll just have to update create_part later.