The ARC LS is definitely at the far opposite end of the quality from the crappy "LED Club" light.
It is about equal, though slightly more pee-greenish than my C Crane 14 LED I got on their special last week. I brought it to work, left it temptingly laying around on the lab bench, and got a few "suckers" with it, who looked right into it and turned it on. That is something they will only do once, believe me...
I prefer the 2-AA configuration, just for mileage, and I have big hands and it just fits and feels better. I have yet to try a 3.6V Lithium AA in the single cell holder, or the CR123
shorty. I use those in my el-cheapo Russian made
NVS, so I do have one or two to try on hand.
My next project is a home made "klingon death ray"
using 4 to 6 of the Luxeon Stars and a 12 V gel cell rechargeable.
Seeing lots of spots lately....
/ed brown