I've got an Amilite T3 that was modified with a Seoul by Milkyspit. This little sucker is bright! Not sure how many lumens it's pumping out, but it's easily over 100. As far as I know, it's using the stock reflector. With a little bit of careful sanding, I was able to make it so that an AW RCR123 fits inside(also had to take the label off the battery). I don't think there's a light this small that puts out any more light.