This is a review of Lightmall's C12 Ultrafire XM-L2 $21.50
Their specs:
Product Brand UltraFire Model C12 Case
Material Aluminum Alloy Color N/A
LED Brand Cree LED Type XM-L2 LED QTY 1
Light Color White Light
Lumens Max 1770-lumen
Working Volatge 2.8~4.2V
Working Current About 4000mAh
Modes 5 Modes_Arrangement High>Mid>Low>Strobe>SOS
Switch Location Tailcap Switch Type Clicky
runtime About 80 Minutes Battry Type 1x18650
Lamp cup material Aluminum
Reflector Type SMO Lens Glass
With Hand Strap Yes
Other than the obviously inflated Lumens I would say it's accurate. I don't have a way to test the amps because my MM is bi-polar, but It's driven hard. More than 3amps would be my guess.
The Good: It's very bright, put up against a C8 T6 at 3amps it's much brighter. The hot spot is fairly large, very bright and very well defined. It's a perfectly round hot spot with very distinct edges. The driver is soldered in very nicely. (so nice that I'm not taking it apart) The fins are very nice and deeply cut. The memory works perfectly. Turn it off, turn it back on it's in the same mode. Well centered emitter and clean clear lens.
The Bad: Nothing. I can't see anything that is a negative on this light.
The average: threads not greased kind of on the sharp size but they seem to work just perfectly, not too fine just OK. The body is light, I would have liked it to be just a bit heavier. Tail cap is the usual. Price was also average. For the money it's a good deal but not a super steal. Shipping time was decent. It wasn't so fast that I said wow that was fast. But it was fast enough that I wasn't even starting to worry. The flimsy box was smashed inside the flimsy mailer with flimsy bubble wrap but the well built light was up to the task and arrived in perfect condition, not a scratch on it.
Conclusion: I really like it. Two solid thumbs up. It's actually one of the only lights I have that I don't plan to change a thing on. I don't care for 5 modes but the memory is great so it's no big deal. The XM-L2 is a bit on the cool side, but again not worth changing because it's one of the things that makes it so bright. On a 5 star rating system I would give it 4.5. Three modes, a little more neutral tint and nicer threads would have earned it a 5 star rating.
I would suggest this light. It's a winner.