KDOG3
Flashlight Enthusiast
I read the review at flashlightreviews.com, but I didn't find what the output is in lumens. Anyone know? Wasn't there a groupbuy or something?
The BriteStuff VariBrite 52L....output level?
- Thread starter KDOG3
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joema
Flashlight Enthusiast
The tested output was 64 Overall Output Units. Multiply by 1.43 to roughly convert to lumens, which gives 91.5 lumens.
http://www.flashlightreviews.com/features/output_vs_throw.htm
http://www.flashlightreviews.com/features/output_vs_throw.htm
KDOG3
Flashlight Enthusiast
Hmmm up to a 17% margin? Thats alot! But 91.5 lumens does sound nice though!
KDOG3
Flashlight Enthusiast
Using their formula, the Pelican M6 3W comes out to only 50 lumens, yet it is rated at 61. I guess I'm looking for the exact number....
joema
Flashlight Enthusiast
That's nothing -- Inova rates the T4 at 100 lumens, yet Flashlightreviews tested it at only about 38.6 lumens (27 output units * 1.43).
There is no enforcement police or regulatory agency for lumen ratings. A manufacturer can essentially claim whatever they want. Nobody will show up on their doorstep and serve papers to cease and desist.
Even IF a manufacturer used conservative and realistic ratings, unit-to-unit variation can be substantial. There's STILL no guarantee your particular unit won't be significantly below or above the spec'd number.
The only exception is HDS who individually calibrates each light to reach the spec'd lumen value.
Surefire uses very conservative lumen numbers, so even though their lights aren't individually calibrated, most every one will exceed the spec'd number. But even then it's not guaranteed. It's conceivable that even a Surefire could fail to meet the spec due to manufacturing variation.
Considering all this, the Flashlightreviews.com output numbers (imperfect as they are) are probably more indicative of what you can expect than any Mfg spec (excepting HDS).
There is no enforcement police or regulatory agency for lumen ratings. A manufacturer can essentially claim whatever they want. Nobody will show up on their doorstep and serve papers to cease and desist.
Even IF a manufacturer used conservative and realistic ratings, unit-to-unit variation can be substantial. There's STILL no guarantee your particular unit won't be significantly below or above the spec'd number.
The only exception is HDS who individually calibrates each light to reach the spec'd lumen value.
Surefire uses very conservative lumen numbers, so even though their lights aren't individually calibrated, most every one will exceed the spec'd number. But even then it's not guaranteed. It's conceivable that even a Surefire could fail to meet the spec due to manufacturing variation.
Considering all this, the Flashlightreviews.com output numbers (imperfect as they are) are probably more indicative of what you can expect than any Mfg spec (excepting HDS).
