I did some digging and notch/bandpass filters are on the expensive side, but you can buy sheets of lowpass filters for a reasonable price: https://www.ocushiel

I did some digging and notch/bandpass filters are on the expensive side, but you can buy sheets of lowpass filters for a reasonable price: https://www.ocushield.com/products/anti-blue-light-filter-laptop-computer-screen https://www.ocushield.com/products/anti-blue-light-filter-la... I would just form a cylindrical lampshade out of such a sheet and call it a day. My bedroom has a dimmable, multi-colored LED in a cloth lampshade that definitely filters some blue light and it's possible to sleep with it on, so I guess the inexpensive, low-tech solution, as it's often the case, works just as well.