This UV LED lightbox has no white diffuser printed with the lens so uses arachne walls for a little more strength. A white diffuser absorbs/blocks the UV so ruins the glow effect and is not used. The back in a UV lightbox also shouldn't have a white reflector for the same reason. (Here's where aluminum tape or foil may win big if you want a brighter UV box - depends on how good a reflector the black PLA is.) There's an optional stand, plug options for the holes, a hooded hanging opening so no light leaks, and an integral strain relief to use with a zip tie to hold the wire from pulling on the LED strip.

For those who want a white light version, https://makerworld.com/en/models/457520 already has the lens diffuser and back reflector properly in place. Don't use the white LED version with UV LEDs. The white PLA blocks/absorbs UV.

I used Bambu PLA Glow filament colors except for PLA Basic Black.

If you use the stand, be sure to route the wire before soldering it up. The hole is way too small for most connectors. If using the stand, you just need the plain back plug. If wall mounting you may want to bring the wire out the bottom or maybe out the back. Just print the appropriate plugs and secure them in place using some cyanoacrylate/superglue.

There are “under counter/accent lighting” UV strip LEDs available that are just like their white and color analogs. I used a Ontesik-998 brand/model (Amazon) self-adhesive UV LED strip with two loops around the inside of the back which isn't even 3W of power. Stay under 5W and you should be fine but keep an eye on it until you know it won't get too hot.

I use clear silicone seal to attach the lens to the body and just let it squish out while something to weight the back sits on it to hold the lens to the back while the silicone cures. After it’s cured up, the squished out excess silicone peels away super clean.