A case to locate a small and light led light on my two up printer. I sourced the parts from a $1 walmart flashlight. It is super bright! and can be attached with a ziptie to anywhere on a 3d printer.
Some soldering required.

Dismantle flashlight, battery cap screws off, SO DOES TOP, but it's on tight! Keep silver reflector, and led array.
Remove spring, solder positive wire to where spring was soldered. Solder negative wire to a corner solder point.
Insert reflector, in proper direction from back.
Insert wires thru hole.
Insert led array into reflector.
Slide back cover in place.
Power with 5v. Can tie directly into e end-stop power on printrboard.
Zip tie on something and let there be light!