I gave in and purchased a #6090, mostly for the "Kennan" driver. Tint is pretty white, construction is good, and it *seems* to reach full brightness with one 3.7v Li-Ion cell. Beam quality is a little lacking, though. The tight hotspot is very bright, followed by a large dark ring with the rest of the beam being spill. I'd say lumen output is comparable to the once-popular DX #1447 module, just around (over?) 100, and brighter than the 80-lumen #1343. It fits in a 6P and 9P with the spring removed and pill unscrewed about a 1/6 turn from fully tight. The only problem is I'll have to unscrew it more than I'd like to in order to get contact with my $14 eBay Solarforce strike bezel. Maybe a coil cut from the spring will solve this. The driver will be replaced with the 3-mode 1050mAh AMC7135 driver from KD. For only $10.14, you can't go wrong if you're looking for a Surefire classic style compatible drop-in, but #1343 will always be my favorite.