Customer Review

20 of 20 people found the following review helpful
4.0 out of 5 stars An excellent Pocket Torch, 25 Sept. 2012
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This review is from: ULTRAFIRE WF-502B CREE XM-L NOW WITH CREE XM-L U2 LED UPGRADE FROM CREE T6 LED -1000 LUMEN FLASHLIGHT/TORCH (Misc.)
When this torch arrived I was keen to see how it compared with the U2 version of the Fenix TK35. Both have the XM-L T6 LED fitted, but the TK35 runs on 2 18650 batteries (claiming about 860 lumens) and this little torch on just one 18650, claiming 1000 lumens.
While the light it produces is good, there's no way it's as good as the TK35 - but then the TK35 does cost four times as much, and takes two batteries. When I tried two CR123 batteries in this torch it improved things a bit, but it's still not as bright as the twin battery TK35.

I'm sure this torch IS capable of whatever the book says the XM-L T6 is capable of, however it seems to be dependant on the battery used, and there's no way of applying the voltage you'd need to get 860 lumens, and even then, I don't know whether the heat sink would be able to take this much power for so long.

So all in all, a great little torch - if it was advertised as 400 or 500 lumens I think that would be more representative of the sort of light you get out of it. It's certainly very bright, but just not comparable with the TK35 or similar.

The great thing about it is that as it's obviously running the LED at a relatively low level, it is working more efficiently in terms of lumens/watt (LEDs are more efficient if not being driven hard) so will probably run for a couple of hours even on high setting - haven't tested this yet though.
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Showing 1-1 of 1 posts in this discussion
Initial post: 21 Jan 2014 21:16:55 GMT
These 502b's pull about 1.3 amps from a fully charged battery. The current / power is largely determined by the led driver circuit board attached to the Cree emitter - different torches have different boards. I reckon this is the best Ultrafire model
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