I have an Air-O-Swiss® Travel Ultrasonic Humidifier (now brand name Boneco). It has a really annoying blue LED light that lights at night keeping you awake. I designed this drop in replacement part that blocks out most of the light. Enjoy!
I find White PLA to be good. Print at 100% with supports for the little hinge part.
Edit 8-10-18: I fixed some tolerance issues. Let me know if you run into any issues.
BioLumo
