An IES file with a . in the name will have its name trucated on the UI button at the dot. For example, LP.AJ_Eklipta_13.8_90193.IES is shown in the UI as ‘LP.’
This is a problem because some manufacturers’ (e.g. Louis Poulsen) IES files use a dot-separated nomenclature in the filnames, and there’s no easy way to tell which file is in use through the UI in this case.