I tried out my new $7 mini LED light panel off to the right side, as a rim light. Seems a bit on the blue side, but I've got every color light in the background, so I don't know if the mini panel is totally to blame for that. Totally worth seven bucks, though.
That's an interesting accessory. I might look into that. But I know the white balance is hard to get right with led (Christmas string lights for me). Especially in combination with other ambient light. But you did it wonderfully here!
