Texas_Ace BLF Calibrated Lumen tube / Sphere No math skills needed - Several spheres still available

[beam0]

I assume TA is going to figure out something better than paper sheets / plastic bags etc. and send us the part that can then be permanently installed. (or tell us what/where to buy it)

[beam0]

@Newlumen

Not bad beam. i got 4662 lumen @30 seconds for the the stock blf q8. Samsung 30q fully charged…

Thanks, I also used fully charged 30q’s (stock button tops)

I was wondering about that one because it was coming up a lot higher with the plastic bags vs the deli paper.

[teacher]

Interesting info Jason. It really shows the variation & inconsistencies of different mediums…. even between the same medium.

[Newlumen]

@beam0

@JasonWW

I would be willing to give TA a deposit for the light and pay for shipping so I can find my particular lumen tubes exact correction number. Then the –5% might shift down to–1% or 2%. I could even ship it to the next person wanting to use it. I don’t know if TA or Micael would want to do this, though.

It may not even be needed. Of the 35-40 tubes made, I think statistically most are already in that +–1% or 2% range. The rest falling into the wider ranges. So passing a light around might be a waste of time. ???

For me right now I’d have no real need for the calibration light because TA is going to figure out what to for do re-calibration (something better than paper sheets / plastic bags) then he will send us the part to install or tell us what to do.

After that I could see maybe passing the light around to confirm accuracy of the fix, if TA recommends doing that, at that point I would be ok with paying for shipping the light to the next member.

I would be interested in sample lights., so I can compare.

[Texas_Ace]

@beam0

I assume TA is going to figure out something better than paper sheets / plastic bags etc. and send us the part that can then be permanently installed. (or tell us what/where to buy it)

Yes, I plan to figure out a more universal option. I cut out some acrylic discs yesterday that fit into the meter hole. So I can stick some form of diffuser to them to get the readings correct.

[Texas_Ace]

@maukka

TA’s calibration lights (S2+ 8×7135 XM-L2 3B and BLF348 219B) are measured and ready to ship as well.

Great! I will pm the details shortly.

[JasonWW]

@Texas_Ace

Yes, I plan to figure out a more universal option. I cut out some acrylic discs yesterday that fit into the meter hole. So I can stick some form of diffuser to them to get the readings correct.

What types of diffuser material have you tried?

I’ve also just noticed that the readings change a noticeable amount depending on how far you push the Lux meter in the hole.

[Texas_Ace]

@JasonWW

@Texas_Ace

Yes, I plan to figure out a more universal option. I cut out some acrylic discs yesterday that fit into the meter hole. So I can stick some form of diffuser to them to get the readings correct.

What types of diffuser material have you tried?

I’ve also just noticed that the readings change a noticeable amount depending on how far you push the Lux meter in the hole.

Yep, even 1mm will have a noticeable effect. The same goes for the 1st piece of PVC as well, how hard it is pressed in can have a surprisingly noticeable effect on the readings.

Now factor that by the 4 joints in the sphere (which you had to take apart to make any changes and then reassemble to measure and hope you got it together with the same force every time, which you never did) and you start to see the tip of the iceberg these were to calibrate lol.

[beam0]

@Texas_Ace

@beam0

I assume TA is going to figure out something better than paper sheets / plastic bags etc. and send us the part that can then be permanently installed. (or tell us what/where to buy it)

Yes, I plan to figure out a more universal option. I cut out some acrylic discs yesterday that fit into the meter hole. So I can stick some form of diffuser to them to get the readings correct.

Sounds great!

[Texas_Ace]

@JasonWW

@Texas_Ace

Yes, I plan to figure out a more universal option. I cut out some acrylic discs yesterday that fit into the meter hole. So I can stick some form of diffuser to them to get the readings correct.

What types of diffuser material have you tried?

Missed this before, I have not tried much yet, until I have a more exact correction factor to aim for it is hard to know what will work.

I am thinking some form of DC-Fix type sheet is what I would like to use, unless I happen to find something that works perfectly. I am going to check home depot sometime to see what kind of options they have. Some very light window tint could work but I have a feeling it would drop the readings too much.

I also cut some discs out of the left over/broken diffusing sheets I used in the spheres to see if they happen to drop the readings by the right amount.

[Newlumen]

So i tested my fenix tk35ue… there is a guy name Kospap who tested the fenix tk35ue and we got similar result… I got 3486 lumen @30 seconds… below is his graph… look like my TA tube is working great with .70 factor.

[JasonWW]

How does Kospap measure it, does he have an integrating sphere like Maukka?

Edit: I see his review. He says he confirmed the lumen output, but he gives no details on how he did it.

[peabody]

Here is just a few.

all readings on original tube at 10 seconds

Olight S1 rated 500 aluminum side down 744 grey side down 710 AW16340 finishing charge 4.08
Zebralight SC62W 930 1245 1175 zebralight battery 4.10
Nitecore TM16GTVn 6300 6650 6540 unprotected 30Q 4.05
Thorefire VG10 847 1178 1050 30Q 4.02
Thorefire BLFQ8 5500 5880 5680 30Q 4.04
Niwalker mm18mbvn 8500 8480 8380 30q 4.05
Emisar D4 3826 4550 4360 30q 4.02
Emisar D1 1434 1828 1747 30q 4.04
4-7s Malestrom mmu-x3 1600 2520 2480 four sevens 4.01

[Newlumen]

I have no clue… i was reading it on cpf and it say light box… . we would have to send PM and asked him how he calibrated and stuff.

[Newlumen]

I sent PM to him… i will let you know.

[JasonWW]

@peabody

Here is just a few.

all readings on original tube at 10 seconds

Olight S1 rated 500 aluminum side down 744 grey side down 710 AW16340 finishing charge 4.08
Zebralight SC62W 930 1245 1175 zebralight battery 4.10
Nitecore TM16GTVn 6300 6650 6540 unprotected 30Q 4.05
Thorefire VG10 847 1178 1050 30Q 4.02
Thorefire BLFQ8 5500 5880 5680 30Q 4.04
Niwalker mm18mbvn 8500 8480 8380 30q 4.05
Emisar D4 3826 4550 4360 30q 4.02
Emisar D1 1434 1828 1747 30q 4.04
4-7s Malestrom mmu-x3 1600 2520 2480 four sevens 4.01

We always put the reflective tape side down into the tube. This is the way TA calibrated it.

If you flip the spacer over to have the painted side down, you get unknown numbers.

[Texas_Ace]

Yes, the silver paint was an experiment to try to make things simpler but it didn’t work. Too bad, that reflective tape was way way more work then it seems.

[NeutralFan]

I spent last night reading through all the posts - interesting stuff!

Curious, does ambient light impact the measurements at all? In other words, does it matter if the measurements are taken in a dark room vs outside in the sun?

[Texas_Ace]

@NeutralFan

I spent last night reading through all the posts - interesting stuff!

Curious, does ambient light impact the measurements at all? In other words, does it matter if the measurements are taken in a dark room vs outside in the sun?

The PVC is thick enough that the most I have ever really seen is 1-2 lumens from ambient light through the pipe itself.

[Newlumen]

So yea. Maukka lumen are legit… he tested astrolux mf02 cw @ 30 seconds and got 2109 lumen…

I tested my mf02 nw @30 seconds and got 2044 lumen.

I am using .70 correction factor as worst case scenario…