Hi Peter, do you mean Antoon Devogelaere of Belgium? If yes, he does indeed still have his collection. You can see this online at
http://www.luminadomestica.be/NL/index.htm and there is a public museum in city of Brugge where it is on display. He also has published recently some excellent books on history of lamps and lighting, but I think they are only available in Dutch language.