I found 7 sparklers in my closet and decided to set a 30" exposure and have fun with it. There were four of us waving them around and for some reason you can't really see us. I think it turned out pretty well. I used a polarizing filter to cut down on the glare and ambient light. The lights were not on in the room (you can see the light on in the other room though)... its just the sparklers lighting it up.