Just a quick update. I used my FoxFury Performace Series light in Fern Cave a couple of weekends ago. We went to Helectite Heaven. As some of y'all know this trip can be a good dry one for testing gear. It's got squeeze spots, a bit of vertical, some crawling, and it's about a 6 hour trip. I had not changed the batteries since my first trip, including during TAG when I had loaned my helmet and light to someone else for a trip, dunno which cave they visited or how long their trip was. I was curious to see how much light time I had left.
The Foxfury light was great - no glitches or 'technical difficulties'. I didn't change batteries for this trip, either, but I thought it might have gotten less bright as we headed back towards the entrance after the 30' pit climb up. Still, not enough to make me stop and change out batteries. I will do so for the next trip, probably. Having the ability to swivel it up and down is nice. I had to turn it off when looking people in the face; it is very bright.
I am pleased with it. The only, ONLY thing I would change about it is to have the switch somewhere where it couldn't get turned on by mistake while in my caving gear bin. It hasn't happened yet but it oculd easily happen, because the switch is not recessed.
Anyway, for the price, I'm pleased with the Foxfury performance light. For those of us without the money saved for a Stenlight, there is a nice alternative in the Foxfury.