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Using a Google image search I found that this version of the image was apparently cropped and flipped from an older one:
Then, using Tineye I found that that version of the image was posted a bunch around 2008. One of the places it appeared was this gizmodo article which is 404’d today but was saved in the internet archive:
That article says its a form of decorative interior lighting, so I would guess that this is a colored fiberglass pipe with some kind of light inside it. Given that it was 2008 it might’ve even been a fluorescent tube.
That makes so much more sense, thank you for your time!