This is a "UFO" LED Camp Light -- search for "ufo led", I got mine from a California seller. I've seen ones like it for $10 thru $150! This one takes 3-AA batteries (30-hours estimated battery life) and puts out a decent amount of fairly soft light -- good to about 10-feet. At $10 you can afford to rig up something with 2 or 3. Works as a main light, a fill-light, etc.
I just hand held the thing but you could probably use Velcro or something else creatively so you don't need to hold them in your hand. Need more ideas on how to use it? prompterpeople.com/miclight.htm
A way to mount it: members.cox.net/monika_a2/xactiUFO.jpg