Most models for mounting LED lights to the Ender 3 are for mounting LED light strips. They also aren't designed for the V2 Neo.
This design is for mounting individual 5mm LEDs in a row on the crossbar for the Ender 3 V2 Neo which has the slot on the top of the rail.
You'll need nine 5mm LEDs and power supply to complete the project. I power mine via usb.
The author marked this model as their own original creation.