Basic top bar mount for the cheap and super bright Eagle Eye LED:
These are 12v LEDs. Two can be connected in series ( red/+ to black/- ) and powered directly from the printer 24v PSU
These suckers get really hot quick! I added several washers, as many as it fit, of different sizes acting as a radiator to manage. See image.
V2: Simplified and cleaned up geometry a bit
I printed it sideways with supports, was easy to clean and use.