Doing a photo booth and I have an off camera flash with softbox and lightstand that I am very comfortable using and I think will work well as my key light. I am doing a photobooth and want the cheapest possible light as a second light. The issue I am having is that I will need something to run on batteries as I won't have an AC outlet where the booth is. I am hoping to not spend more than $100 as it is something I won't use alot. Also, I live in Canada so it has to ship there. Ideas?