I gutted 4 harbor fail FREE blue oval flashlights for the LED strips. The flashlights use three AAA's and the LED's need a current limiting resistor (use the one in the flashlight, one per LED strip)
You can also steal one of the switches to use.
I 3D printed platforms to mount the LED's on, but my first version just used the diffusers and glued the LED's to those. So if you dont have a 3D printer you could do that.
I've seen YT videos where people just took LED flashlights or pucks and simply taped them to the diffusers. I wanted something a little less top heavy and more compact.
I was able to go shooting in dusk conditions and chrono no problem.
This is pretty ghetto with glue-gunning and zip ties but it works.
Note: I tried putting the LED strips on the other side (outside) of the diffusers first, to diffuse, but it wasn't enough light and didnt work. The diffuser attenuated too much.