To me it looks like a garden light. Certainly not a garden lantern, but I have similar lamps that I installed along a path in my garden. Check if it has diodes on it - garden lights come in all sorts of forms. I also recommend these https://trimthatweed.com/best-yard-torches/ if you're interested in this kind of thing. But if it's not a bulb, then I don't know what it could be=) I`m passionate about the topic of lighting, believe that landscape design cannot be imagined without lighting fixture, garden lights are a cool way to organize the space around the house.
