A green screen, also known as a chromakey, can make life really easy if you are doing a lot of video work and want a simple solution for dropping in different backgrounds. David Dugdale created a great tutorial for green screen which shows how to effectively light a chromakey background and key it out in Premiere. ReflecMedia has created a different solution for chromakeying with their Chroma Background Kit. It uses a green LED ringlight that illuminates their special background made up of glass beads. Even with the lovely Olivia Tech explaining how it works, I'm still a bit shocked that such a small ringlight can illuminate the background without affecting the subject. This system isn't cheap but I can see the advantage of not having to carry extra lights just to evenly light a huge background especially out on location.