Just wanted to note, a print in red Bambu Lab PLA-CF has already lost much of the little vibrancy it had, and it wasn’t even exposed to sun (just laying on a desk in an office). Maybe a 1 month old print.
I like that filament, and I understand PLA itself is not UV-stable but I don’t think it should fade this fast.
Flurescent lamps. Mostly off since I’m usually the only one here and sit by a window. It’s been right next to a window for some time, but it’s subterranean room so very little direct sunlight.