This is an enclosure for mounting LED lights on aluminum t-slotted extrusion, with the intended application being to illuminate the build platform of a 3D printer. Mine is a TAZ 6, but it should work well with any that has a framework constructed out of aluminum extrusion (either 20x20 or 10 series).
The original design may be found here: https://a360.co/2zURIVr
You will need LED lights, a switch, a voltage adjuster and a DC power connector. This is what I used:
LED lights: https://amzn.to/2Lakab4 (2 for $9)
Switch: https://amzn.to/2LoCZ9F (10 for $8)
Voltage controller: http://tinyurl.com/ydgjy6yr (2 for $9)
DC power plug connector: https://amzn.to/2O5eI72 (10 for $7)
So you can get a decent light for about $16 in parts and plastic.
It's a tight fit and the blades on the switch will have to be bent. There is also a little bit of soldering involved. Use double sided tape to secure the lights inside their recesses. Let me know how it goes and if you have any questions.