05/02/23 at 23:19It would be fantastic if you could make it one year Keiron, I have so many old incandescents to bring! Sometimes there is a spring or late autumn meet - are there any months that would be easier for you?
I think these single ended tubulars were sometimes used in larger switchboards, picture lights and for some appliances. Decades earlier they were used in wall lights, before the present candle and globe types had been introduced. In Americas they are very popular for sign lighting.