My dad collects beer pumps, amongst his serial hording issues. His are all supplied with 24V AC and a few of them have come attached to what looks like bell transformers, usually multi-output. Might be worth keeping yours at 24V in case you get others (?) which already have lamps in there. 24V will use less current too.
https://shop.atlantic.org.uk/bar-lig...rmer-216-p.asp