I was using a Surefire Fury 500 lumen flash light that I pulled off of a rifle of mine. I used that $5 plastic flashlight mount that you have on the right side of your picture. Worked very well, just like $3-5 for 2 hours of run time on that flash light.. so not the most economical setup.

Since it's been light out at least up to 7:30-8 I haven't used it at much.