I used to stock, install, and install battery operated lights in every canopy I would sell as standard equip. It would always tuck up high enough not to hang below the inside frame clamp ring and took four "D" sized batteries. There are some batt operated lights out there that only take double A's and they are short lived in cool weather. I have used these lights personally at -40 Caribou Hunting and shed the standard amount of light as long as you needed it. I also put 2 of them in the "Dog's Camper in 2005 when we moved to SC. Today 2014 you can go out in the "Dog's Camper" and those same light still work with those Duracells in them. I tried one just for grins a couple of weeks ago to see if they would light and they do, could not believe it if I didn't see it. This is where it's been sitting since 2005 when we pulled it of the trailer.