Just joined BLF today; first post & Q: What is the difference between Ultrafire 502B Cree XML U2 and T6?

LED Flashlights – General Info
1

Both are nearly the same $, & both claim 1300 lumens. Thanks in advance : )

2

U2 and T6 are both brightness bins for the XM-L emitter. Better bin = more light per watt.

T6 @ 3A = 910-975 Lumens

U2 @ 3A = 975-1040 Lumens

...taken from http://flashlightwiki.com/Brightness_Bins

First, what are you buying, and from where? How hard the drop-in/light you are looking at is driven will affect the brightness more than the bin... Also, a brighter bin may have a worse tint making it look worse than the lower brightness-bin emitter.

<Edit> Neither will be 1300 lumens. As heat builds up, efficiency will drop, causing the brightness to drop. Also, output will be decreased due to losses through the lens and reflector...

3

Welcome to the Land of Lights, You are now a ROBO Flashaholic…

http://kaidomain.com/Search/SearchResult.XM-L2

Never, again, to have any extra money… J) :party: :beer: Quoth the RaVeN, Nevermore…

4

Thanks alot for the quick reply! They just seem like the best deal (around $9.50) for $-to-Lumen-output ratio on Amazon & Lightmalls.

5

As one relative newbie here to another, you should be aware that a lot of times the “lumens” claimed are usually somewhat exaggerated, so take what they (light vendors/manufacturers) say/advertise with a grain of salt.

A “XYZ” emitter may be able to emit 1000 lumens, but that doesn’t guarantee that when that emitter is in a given light, that that light will be able to output 1000 lumens.

Jim

6

Hi Jim,

Thanks; yes, after reading numerous reviews on various Cree flashlights, many reviewers post comments like, “this flashlight is nowhere near (#) lumens”. Any suggestions as to best price/quality for a Cree flashlight that puts out at least 850 to 1200 ‘true’ lumens— thanks in advance.

7

I’d leave answering your question to others who have more experience here, but I also would ask what type of light “behavior” you are looking for, i.e., more what they call “floody” (ability of the light to “flood” an area with light) or more “throwy” (sp?) (ability of the light’s beam to reach further distance), or some combination thereof?

Jim