I found this little blue lights from chrismas with batteries for just 2 € and decided to design a lamp that fits. The picture is not the latest design. Working in progress.
You can download on tinkercad.
https://www.tinkercad.com/things/9KDJOCUeQFR
V 1
fixed the design to better insert the little lamps and to give more place for the cables
cheap_lamp_v1.stl | 328.4KB |