Mine came in today, I ordered the 4k SST20 on my TA Lumen Tube I get about 1900 lumen in turbo at startup with an Efest IMR 14500 then drops hard in about 20-25 seconds to around 100 lumen which it seems to maintain. Absolutely amazing performance from such a small flashlight. The tint on both of mine is absolutely great with no hint of green.
Just a couple of quick comments. I would love for a stainless steel bezel to be released I have dropped mine a few times and it fell with the bezel striking the ground first each time. I predict this will become the standard EDC light for a lot of users here. Some will complain of the low amperage constant current, but this thing really packs a punch.
Pricey? Sure. But this thing is a hunk of plastic, really really thick, which gives it good performance with high powered flashlights. It even has o-rings.
No offense but this is really cheap to produce with injection molding. And plastic material costs are inexpensive, too. For $ 20 you get a full flashlight like Sofirn SC31 Pro.
Great alternatives! :D :THUMBS-UP: Anyway, I just asked Fin17 if he can do something about the lampshade‘s price on Banggood. Maybe a group buy can do some extra magic to drop the price even lower than usual, IDK. Don‘t we all have at least one or two FW3A or FW21 Pro at home already? ;-)
Concerning the button cells, I vote for a nice 12S buck driver (12x CR2032 = 36V) with awesome constant current regulation. No need for too short tubes. ^:)