I was wondering if there is anyone out there shooting with the Einstein 640 and White Lighting Heads? Using the WL as a key and Einstein and a fill? Anyone see any potential issues this setup as far as color shifts in the different heads?
I don't have the lights (I use ABs) but since the Einsteins have a constant temp feature and others will vary in color temp with power I suspect you would get a difference in color temp that will vary depening on the power of the WL. You might want to call Buff and ask them the question since they are likely to have done comparative testing with a color meter.