Forgive me for saying this, because I hate it when others do, but in the words of Obi-won - “use the Google, Luke!”
Seriously though, it’s very odd wattage settings so I just searched for 1.5w classic car bulbs, I saw they are BA7s and on the next search I went for “BA7S 12v”.
Now the magic has gone, are you still impressed or just meh!?