Does anyone know anything about these lights. they are broken anyone have any info if they are still purchasable? we think they are 24 volt light bulbs
A bubble light. I've never seen a base style like that though. Amazon still lists bubble lights (at least Amazon US does). While I would assume you already know, if by chance you do not, the glass part needs to be nearly vertical above the base to 'bubble' properly. I also found a couple types on a Lowes and Etsy search, also US.
I would think that a web search (try "Christmas Bubble Light") in your location should produce some vendor results (with the correct voltage and plug to run them). Nifty lights; parents had some many years past. They were a real pain to keep oriented.