Photogenic AKC645BK 640ws StudioMax KitThe Photogenic AKC320B is an excellent choice for any photographer who needs battery powered monolight that maintains a constant color temperature. It's easy to use on location or in the studio. These lights employ "constant color" technology which prevents the color temperature from visibly shifting, regardless of flash power level. You can be confident that the white balance at 320Ws is the white balance at 10Ws. The AKC320B gives you the freedom of