I use an anker lc40 flashlight its 20 bucks on amazon and right now they have the bigger lc90 for 20 as well both are as cheap and as usefull as you can get . they are 400 and 900 lums but they do get hot andvneed a charge after every use . i mount them with 2 hose clamps , they are almost tac light quality they will blind and illuminate a path or road about 30 feet ..