I bought this for a fill light for a small studio which was a mistake for a small studio. This light is now my new key light and is way better than the one I had. At 5600K the light is only reduced to 20%, making it white for direct fill, but it's a great key in a small space. My usable area is less than 10x10 and I would suggest if you buy this to fill in you have more area. I am really happy with this light and contrary to some reviews it is a complete kit. Light, battery, power supply and a short USB port to charge the battery although I believe it runs on AC power.