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

I assume you will add a bit of glue to the main pieces of pvc pipe so it can’t be taken apart. If it is, then the diffusers might get rotated and lose it’s calibration.

The inlet section that is aimed upward I can see leaving unglued. Rotate it flat for shipping and have a mark where it should be rotated 90° to face upward again.

These should not need much packing material as the pvc is so robust. Just wrap the meter and centering rings well and put it in the center.

I am not 100% sure where I will glue things yet. If the PVC itself is not glued together then the diffusers will be glued inside of the PVC.

Gonna have to see how things go before I figure out the glue, that will be the last thing that happens.

That said, I am pretty sure that all but possibly the first piece of PVC will be glued.

I am off to the laser cutter in a few minutes.

Well, I am 4 hours in at the laser cutter so far, think I have about 1/8 of them cut at this point. Took me a few hours to get the settings figured out and now I am having to run it at 15% speed which takes for stinking ever for each cut.

I am really liking this new setup, even more then the first setup.

Thanks for all your work on these TA. I’m sure by the time its over you will have decided you charged way too little for them :slight_smile: We’ll be very grateful though.

On the glue situation, I know they’ll have to be glued some in order to keep things lined up for calibration. That’s fine, good even. I want mine to stay together. But I do hope any of the “vertical” pieces can be left loose so they can rotate down for storage. I don’t know about everyone else, but I don’t have a good place where I can leave mine out all the time. I’ll need to be able to fold it up and put it away…somehow. If at all possible.

Thanks sir!

You mean you don’t have a shrine for your sphere?

So you can hide it from your wife? :slight_smile:

Wife: Is that our drain?

Flashoholic: Uhhh…no…

Wife: It looks like our drain! What is it?

Flashoholic: It’s a calibrated lumen tube no math skills needed!

Wife: what…

Flashoholic: It measures lumens!

Wife: loomans? Is that another thing for your stupid lights!?

Flashoholic: yes…

Indeed, I am already getting that vibe lol.

Yes, I plan to leave the 1st piece unglued for shipping as well, it will be much easier to ship with it down.

9 hours at the laser cutter and the end is in sight! Maybe another hour and I can go home! lol

So ended up being a little under 11 hours total, wow, talk about a lot more work then I expected. Didn’t even finished, still got to go cut a few more sheets but they were closing.

Here are the pictures I took yesterday. First you can see the ever growing pile that will become these spheres. I just moved them out into the open.

Another shot that also shows the samples I pulled out for testing.

What I spent all day laser cutting today, I will try to get some after shots later.

The results of my work yesterday to prepare for the centering rings.

Im in for one. Thanks!

PM sent with payment instructions.

I’d like to sign up, thanks. 3.5”

Make sure you say what size you want.

Thank you!

How accurate is this compared to a professional calibrated integration sphere?
Also afaik nobody has tested the HS1010A against a real high quality luxmeter, so it’s hard to know if the numbers it’s giving are correct, especially with different colour temperatures.

PM sent with payment details.

Yep, include all the requested information with your payment, that is how the list is being populated and how orders will ship.

I have interchanged it with my LX1330B meter several times when I was setting up the sphere and the readings were always within a few percent.

I just did it again now to confirm my earlier tests and just holding the meter in the hole without a good seal it was reading about 5% low from 13 lumens up to the 1100 lumens of the test light, which is expected since it was not sealed into the PVC like the hs1010A. Confirming my earlier results, the HS1010A is a perfectly acceptable meter.

I stuck with the HS1010A because it was much much easier to mount to the PVC and it was simpler to use.

I have both but I have used the HS1010A in my own sphere since I finished it. I do not regret that decision at all.

Far as accuracy vs a $10,000 ANSI sphere, no idea, I don’t have one.

If you have a real ANSI calibrated sphere I would gladly send you a sphere to professionally calibrate it so we can find out.

What do you expect at 1/100th of the price?

Yes. Totally agree… why should we buy a professional sphere for $10000. We are not in flashlight business… all we are doing is testing out lumen even if they are off by a few hundred.

I see 29 people bought your lumen tube… it say your product is very good.

I agree it’s a bit silly to compare to ANSI sphere but I am curious how much better this is than my shoe box and cell phone rig.