I received this additional information from an instructor at SFA :
This light is specific to French companies, especially Air france. It covers a certain warning, (illumination of those lights when the RA’s fails in dual ch appr, or loss of valid Loc or GS info…. This is a requirement from the DGAC and is only functioning when the sim is loaded in SEA version. Note that I saw exactly the same lights in Casablanca on RAM simulator….