You need more faith in Newlumen.
Texas_Ace BLF Calibrated Lumen tube / Sphere No math skills needed - Several spheres still available
I got 2877 lumen @30 seconds for the lumintop odf30… no plastic bag, and .70 factor has been counted.
So that is with or without the correct factor being applied? I assume that is after just not sure what the “counted” means in this context.
Very good, it looks like they are averaging out very good sphere to sphere. That is the hardest part by far so I am very pleased with those results thus far.
Okay, so the raw number was 4111 I think. I remeasured mine at 30 secs with a Liitokala and got 4490 x .70 = 3143 so we are very close. Within 10, which is well within Cree’s 14 tolerance.
Are you using a protected battery? I’m not sure if that will effect a boost driver, but it might. Our numbers might be even closer if we used the same battery.
Got to remember that not only do you have the 14” tolerances of the LED to factor in but also the 1% (resistors are usually 1) to 20 (capacitors, coils and other such components range from 10% to 20%) tolerances of the components on the drivers.
On top of that and many of those tolerances compound on top of each other. Particularly with buck and boost drivers as they have a lot of components that factor into the final output.
This is why using random lights off the assembly line is so inconsistent and hard to calibrate a sphere with.
Here are some fresh numbers from most of my lights. All CW.
Some interesting notes are that I lost 23% output on the X2R by switching the reflector to a 60° TIR lens. So to go from my headlamp measurements, which both use the same 60° lens, I need to add 30% which I did at the bottom.
The new Boruit 5K headlamp is kicking some butt. It’s rated at 5000 lumen, but that is Chinese lumen so completely unbelievable. I think the predecessor RJ02 was only about 300 or so lumen, but this one is an estimated 650 lumen. Not bad for a no name emitter.
Most of my lights match up to the JoshK Sphere by the same general percentage. The C8 was off quite a bit. I wonder if it’s due to the narrow beam.
The L5 and L6 are my custom lights which is why they are reading very high.
Thanks you the info… you should test fenix lights… they have a higher lumen standard…
I Do —————-NewLumen is a Good Dude
What does “lumen standard” mean?
Do you mean it’s more accurate to the rated output?
I never pay attention to rated output. I tend to go by emitter type, driver type and amp draw on battery. Then I compare it with emitter tests done by testers such as koef3, djozz, match and others. I have most of these charts in my head.
Then I calculate estimated driver, reflector and lens losses. Battery type can also play a factor. Anyway, I can pretty much tell you what it should be outputting and whether it’s more or less than the rated output. It’s not exact, but not bad for a back of the envelope calculation. Flashlight manufacturers can’t bend the rules of physics. Lol
The general rule of thumb is that most lights are below their rated output.
I never paid much attention to Fenix as they always cost a lot more than similar lights from other manufacturers.
Yea Randy at PflexPro haven’t been very responsive to emails in the last two months. He used to reply to every email right away. I hope it’s just because he’s taking a long vacation temporarily.
Trust me. If thrunite, acebeam, lumintop, olight use the fenix integration sphere, their number will be much lower…
I tested my fenix pd35 at 30 seconds… i got 1415 lumen x .70 = 990.5 lumen… fenix rated 1000 lumen…
So its safe to say my correction factor is .70 or so.
Good info. .70 is looking like a good number so far but gonna be interesting to see a calibrated light to compare.
My lights are in Finland now. If we are lucky i’l have them by end of next Friday. And if i’m lucky i’l have my tube to test too 
TA, I’ve yet to receive a response from either of the individuals I had contacted regarding using their spheres. Was hoping for better news for you. I know you are shipping your lights overseas, but I’ll keep you posted if anything changes.
Not sure I figured this properly (I'm not great with math) but it looks like my correction factor average is about .77 ?
Using .70 correction factor the 2 sheets Deli paper is almost spot on for correction.
Model |
TA tube @ 30 seconds |
Mfg spec. |
% of mfg spec |
difference % |
.70 correction figure |
2 sheets Deli paper |
Eagletac D25C2 (XP-G2) |
625 |
530 |
84.8 |
17 |
437 |
435 |
Eagletac MX25L3 (MT-G2) |
3350 |
2375 |
70.8 |
1.3 |
2345 |
2360 |
Jetbeam E20R |
1290 |
990 |
76.7 |
8.8 |
903 |
895 |
Nitecore HC30 |
1453 |
1000 |
68.8 |
1.8 |
1017 |
995 |
Jaxman E2L 3*Nichia |
895 |
720 |
80.4 |
1.7 |
626 |
629 |
Sofirn C8F v2 |
3340 |
2580 |
77.2 |
9.4 |
2338 |
2510 |
ThruNite TC20 (NW) |
4240 |
3800 |
89.6 |
22 |
2968 |
2960 |
BLF Q8 |
6950 |
5000 |
71.9 |
2.7 |
4865 |
4910 |
Convoy C8 7135*8 HI 1A |
1148 |
900 (est) |
78.4 |
10.8 |
803 |
786 |
Average> |
77.62222222 |
OK, I redo my calculation with new Data from Maukka. I also take Maukka’s advice remove both Lumintop Tool AAA Copper & Tool AAA TIs’ DATA from the averge calibration#. Base on maukka’s review DATA; I simulation status best I can ( same model of lights with same CCT & use the same batteries). My new average calibration# for TA’s tube is 0.657939. I don’t trust any Mfg spec. I won’t recalibrate any integrating spheres with Mfg spec#.
We aren’t trying to find a specific number to make our readings match a manufacturers rated spec.
We want to know how far off the manufacturers specs actually are.
The bummer is that TA’s tube was calibrated to match a lot of other people’s lumen measuring devices on BLF and CPF. So people like DB Custom, Matt at Adventure Sport Flashlights and many others here were all measuring high.
We may have to scrap a bunch of old measurements from the last several years and start fresh based on guys like Maukka and certain TLF members, etc… who base everything off properly calibrated reference sources.
It sounds a bit scary.
Did you measured them before sending? When Maukka has his lumen readings we can have a correction factor very quick.