I too also expected the defender III can be the great thrower in it's size and can reach to 30,000 lux.
My Romisen RC-C6 Q5 got 12,000 lux with using 3.7V RCR123A, I have it's beamshots and runtimes in my review, but the review was written in Chinese, if you don't mind, welcome to take a look:)