I appear to be having the same issue. Is anyone able to offer a solution to this?
Thanks for the prompt response.
I've done that and I have my export setup as in session to ensure my settings are being applied. It seems to pull through the lighting source on some fittings but not all. Also the ifc export doesn't appear to be consistent as I've had previous exports where the problematic light sources aren't being pulled through.
I haven't got to the bottom of it, and suspect something isn't quite working right behind the scenes, but for anyone else facing similar issues use IFC version IFC2x3 Extended FM Handover View. It works for me!
Have to tried turning your light-source off in Revit before export to IFC?