Re: X60Mvn ;-) Yes that does seem to be the case. Are you happy with the light? Think the runtime is good before thermal reduction? Do you use it regularly? Just curious as I use my mine regularly and think it does ok before getting to hot but am thrilled at how many lux it puts down range. Are either of yours a Fiat Lux?
Yes very happy with it. I don't really follow the thermal stepdown, and tend to basically go by feel, keeping my hand by/on the heatsink. It does stepdown, it's just that I usually turn it down myself first. Runtime is fairly good, so long as you're not using on max. Bit of a pain in the butt to use six matched high drain batteries, aside from that I'm happy with it. Basically with it on hand, I don't need any other light.
It doesn't get all that much use, mostly due to size. I do use it when I go camping, but that's usually only ~6-10 times a year.
Personally don't see a huge reason to spring for Fiat Lux. Vinh's work is excellent to begin with so the difference is marginal. Though if you can afford it, go for it. Unfortunately Vinh outdid himself with that light... I haven't felt the NEED to buy another in almost a year now.