UPDATE 8-12-25   

As per request I have added a print profile without the built-in supports. You will have to add your own support. Enjoy. 

I wanted my lights to face down onto the bed from my riser. Couldn't find one so made up a quick simple one. I also included tabs to keep the lights from falling if the adhesive fails or isn't present as with the ones I use. Should work with about any light strip you choose. Has a cut out in the back right corner to allow the wire to travel through. I also included built-in supports that are pretty easy to remove. When you slice the file you will get a floating cantilever error. You can safely ignore it, or add more support if you choose. I printed just as it's presented with no supports and had no issue. This thing is pretty basic and low profile. If you have any questions, please ask and I'll try to help. There are 2 short sides and two long sides. Just assemble them and go. Glue helps with keeping the pieces tight but I wouldn't recommend until after you route your lights so you can work the corners. Also, print whatever you choose but keep in mind with the heat, PLA may warp pretty quick. Thanks and happy printing.