re: DIY red or green feeder lights for pigs

Dont really know a budget...id like to keep it cheep otherwise id just tell him to get a ATN X-sight like I have for $500 for himself. What id like to do is be able to rig up his 3 or 4 stands with something on the feeders so anyone can hunt them rather than having gun mounted lights that you have to take on and off to rig up on others.

EDIT: That Ambush A1 looks nice on there site...wish it was 1/2 the cost tho