In light of Surefire's Titan Pro (or whatever it's called ) pushing a claimed 300 lumens from an AAA there has been some skepticism. At least I've been skeptical because 1.2v is only a third of the voltage needed for optimally operating most LEDs. In other words, that battery would be working very hard. Well Zebralight has been known to be optimistic in the past but this latest email teaser (subscribed to their newsletter) had me believing driver tech has changed for the better. If this is the case the bottleneck will be battery technology. Most off the shelf XML2 lights with an 18650 can get close to 1,000 lumens which is a soft-cap for the LED. Ie: the curve of lumens for amperage is on a quick decline. Still, the aspect of EDC lights on conventional cells pushing massive amount of light is within our grasp despite your brand of choice is very exciting! I still think Surefire is a bit optimistic and I won't be a fanboy of theirs overnight but we will see.