"glitchy" lighting issues with some meshes

i’ve had some meshes light incorrectly, like it shows sort of glitchy and when i turn the dynamic light off they’re still bright white while everything else darkens
why does this happen? the example in the picture is the same mesh as the one next to it, just a clone, yet one lights properly and the other one doesn’t. is it overlapping with something else? i’ve checked and it doesn’t seem to be overlapping with anything around it. there are a couple more meshes where this happens as well.