Tell us about yourself!
You're right, I don't know FOR SURE what the intended use is; I can be humble enough to admit that. But considering where these are typically used there's still a pretty good probability it's outdoors at least for the summer. Nice to know there is such a thing as a biodegradable plastic in any case. I can see where it would be good for prototypes that might need to be tossed if modifications need to be made to a particular design.
I don't have a 3D printer so I won't be making this particular version, but I am impressed by how bright these are. Most of the ones I see in stores are so dim they're really only good as marker lamps. These give some actual illumination.
PLA wouldn't last outdoors.