These arms will support an under cabinet LED bar light to illuminate the print bed. I used a 12" under cabinet daylight (5000K) light bar with dimmer and power supply from Amazon https://www.amazon.com/gp/product/B0972H742R . It's only $16 and provides plenty of nice, even light.
The supports just clip on to the printer frame and a small zip tie secures the light bar through holes in the arms. They are thin enough to not interfere with the head movement. The arms bounce a little when printing but the light is even enough to not really matter. Print with 40-50% infill for strength.
The author marked this model as their own original creation.