Texas_Ace BLF Calibrated Lumen tube / Sphere No math skills needed - Several spheres still available
I did the kawi’s way… i put one layer of plastic on the sensor and the number were reading lower…
Turn on… general reading…
Noctigon m43… 7200 lumen
Fenix L16. 1950 lumen
Fenix tk35ue… 3640 lumen
Blf q8. 5230 lumen
Malkoff wildcat v6. 1200 lumen
Lumintop odf30. 3510 lumen
Thrunite tc20. 3280 lumen
I measure tn42vn90… 5000 lumen… it was about 5200 lumen turn on and stepping down gradually…
From my general testing, ths lumen tube is pretty accurate without spending thousands of dollar…
Thrunite catapult v6. Using shockli IMR
Turn on. 2320 lumen
@30 second. 2200 lumen
Glad to see a measurement of the TN42vn90. Did you add an extra layer of diffuser sheet at the meter?
Yea. I will test more lights especially Tn42vn90.
My Malkoff Wildcat with 3 new batteries…
I have no idea what the ratings on most of those lights are supposed to be, would you might posting the rated lumens with the measured lumens?
Also some readings without the plastic would be nice to get a better idea of a general purpose calibration factor for everyone.
Sooner or later a number will have to be averaged out and selected for all of them to get comparable readings.
So far I get better reading with the plastic… it is pretty consistent…
How do I make this tube stand level?? I can’t twist it anymore.: do you use heat gun ?
I want to make my lumen tube stand like the one in the first photo…
Try losening the the closest locking ring
I will figure out… in the meantime, I tested the tn40vn90. Skylumen got 5000 lumen @30 seconds…
I got 5600 turn on… 5000 @ 30 seconds…
Olight sr96vn… vinh got 12000 lumen… TA lumen tube 12540 lumen.
Stock acebeam L16… 2100 turn on… 2050 @30 seconds…
So this tube is pretty accurate.
No heat gun. Eat your Cheerio’s Newlumen & twist that thing to where it belongs…… 
Yea… i am very agree. My wrist size is 206 milimeter or 20.6 centimeter… i am a small guy…
I am getting very comfortable with the TA lumen tube… I am getting better results…
Just set it like that and place your light…
More test… first one is turn on, and second number is 30seconds… batteries use were sony vtc5/5a/30q… give or take.
Malkoff wildcat v6. 1475/1408. Lg mj1
Thrunite tc20. 3820/3740. Shockli imr
Lumintop odf30. 3560/3410… oem cell
Thrunite catapult v6. 2670/2540
Fenix tk35ue. 4560/4470
Emisar d4 quad xpl. 4360/3660
Emisar d1s. 1796/1734
D4vn skylumen quad xpg2 dedome. 3580/1650
D1vn skylumen sst40 sd. 2400/2250
Fenix tk72r skylumen. 14000/13820
Pelican 7060… some box say 368 or 402… fresh off charger. 450 lumen
Noctigon m43vn xpl dedome… skylumen 11000, TA 11320
Haikelite mt09r xhp70.2 cw. 25500/22800
Just use your BLF GT for half an hour a day and watch your muscle grow 
Btw, the numbers you got looks pretty accurate. Is this with the plastic sheet added at the meter or just stock from TA?
Nope, no glue or heat gun on that joint. Simple wiggle it back and forth while putting it out and it should loosen up. Then you can twist it to where ever you want.
Yeah, I agree the plastic is better for the readings, I am wanting to figure out how much adjustment the spheres need. The more data the better.
It is very difficult to get the turn on lumen number because number change quickly… but after all, we look for 30 seconds lumen…
So far so good. TA numbers are pretty close to skylumen…
I add one layer of grocery plastic bag. Make sure the light is stable.
I don’t know how malkoff measure their lumen… wildcat v6 is rated 1050. Maybe they are using 4 cr123 or protected 18650… we got 1400 lumen range using unprotected.