Alan, I've seen you post, and while I agree wholeheartedly that there are shortcomings I don't film many non-caucasians - and that's an extreme example of CRI issues.I'd be interested to see tests of a variable colour temperature unit against a fixed unit.Have a look at the Coollights blog for an article explaining the methodology they've used on their variable temp LEDs: http://www.coollights.biz/wordpress/archives/199Richard Andrewski from Coollights is a regular contributor on another well known forum and has been great when I've bought kit from him in the past.Duncan.
As a follow up.
The new version of these has a digital readout of brightness and temperature.
Also a nice set of barn doors.
And you can stack multiple units together using a groove system built into the lights.
The price is roughly the same too.
If you want to save a few quid, contact them directly and ask Iris for a deal.