Hi, Bushman,
I just received a 2.5 inch SRTH turbo head and it puts out 15,000 candlepower--real measured candlepower--and is 30-50% brighter with a slightly large spot than my UKE SL-6.
It's also quite tiny.
I haven't seen the 3-inch head.
By the way, the measured candlepower of my Vector "1M CP" 137CO spotlight is 100,000 at its peak, so imagine if the same factor were applied to the SRTH!!!!! I'm not saying that all manufacturers do this, but, what does M*** Ins*** spec for a 6D light and what does it say on my Web site?
Cheers,
Richard