I'm still working on organizing my LED Video Light tests which should be posted up soon, but I can tell you right now the F&V lights are high on the list of quality output with both CRI and LUX readings. Having said that, a few people mentioned how the K4000 Studio Kits and R-300 LED Ring Lights were out of stock, but I received notification that they are currently available again (links below).
K4000 Studio LED Video Light Panels
