in no particular oder: Barbolight, Surefire M6, M4, U2. Li14430/Larry light, Arc 4, Mr. Bulk Lionheart, Arc LSHP, Arcmania KJ
That M6 is still one of my grail lights.
I use a Streamlight Microstream. Single AAA battery.
I carry one every single day. It's only 27 lumens, but it throws damn near as far as any of my high lumen lights! I can easily light up a target at 50 yards...it's just not uber bright.
I've got a new one in the mail as we speak...
I didn't even know that Surefire had a 170 lumen version of the L4. It's not listed on their website. I had one of the old school 100 lumen L4s. It was awesome...just not quite enough throw. I'm hoping this one will rock the house!