LED ring. 60pcs of 5mm LED with modified LM2596 CC/CV module

This is a led ring intended to be used on a microscope. I copied the external measurements from another LED ring that I got with my analogue microscope which means that the internal diameter of the LED ring is 60mm.

I use a modified LM2596 CC/CV module to get a constant current source. The modification consists of cutting the current measurement trace on the PCB and replacing it with a low ohm power resistor to lower the maximum allowed current output of the LM2596 module.
I also replaced th