I admit it! I have a mixed variety of monolights. I've got a Speedotron Force 10, an Alien Bees Ring Light, and a few SP Systems Excalibur 3200 and 1600 units. I try to not mix them together on the same set to help maintain color fidelity. But I decided to test them all out to find out just how different the color temperature of each is and how consistent the color is when dialing down the power. (Am I the only person out there who wants less strobe power or lower ISO cameras? I would like to have a good ISO 50 or 25 available. Higher ISOs with less noise is OK, but I'm often going in and adding grain.) Anway, this isn't a scientific test, but I think it will work for my needs....