I am indebted to David ‘Pip’ Dolbey-Jones for his assistance. He operated a club c1986 for lightbulb collectors which had members around the world. The club published a newsletter ‘THE GLOWLAMP COLLECTOR’ and the address is:
(Removed 2003)

I would also like to thank the other people who made valuable contributions:

• Mr R M Tucker, Public Relations Manager, Siemens Ltd., Middlesex, England.
• Mrs Jane Carter, Press Officer, Crompton Parkinson Ltd., Northampton, England
• Mr C Wimpenny, Company Archivist, Ferranti, Oldham, Lancashire, England.
• J D Dolwin, The General Electric Company, plc, Wembley, Middlesex, England.
• Philips Electronics, Lighting Division, Croydon, England.
• Ragnick, AEG, Öffentlichkeitsarbeit, Frankfurt, Deutschland.
• Dr L Schoen, Siemens Museum, München, Deutschland.
• Orazio Curti, Il Dirigente, Museo Nazionale Della Scienza e Della Tecnica, Via S Vittore. Milano. Italy
• FILE S.p.A. (Leuci), Lecco (Como), Italy
• OSRAM, Società Riunite OSRAM EDISON-CLERICI, Milano, Italy
• Åke Björkman, LUMALAMPEN AB, Development Dept., Karlskrona, Sweden