Yes! Someone knows about the factory in Emmen! The office in Capelle aan den IJssel is still closed to this day, and the factory at Emmen was transfered to Sustainder B.V which is another street lighting company, and the showcasing area is still full of Industria fixtures.
As for the Factory in Spain, i've seen production go very well there, they make specific fixtures in different countries, for example the current Iridiums aren't produced in Spain, but in Poland, Spain produces all of signify's flood lights and tunnel lights, the UrbanFlex, Citymood, Luma², Sunstay and Sunstay Pro, TownTune, Milewide gen2, Classic Street, Villa gen2, Citycharm Fluid, and Citysoul gen2.
For all those fixtures there is a specific assembly line.
But i've never seen any production of electronic ballasts in Spain other than Poland.