WTS: Calibration lights for DIY integrating spheres / lumen tubes - 67 € -

Duv, R9, and TM-30-15 are the values I look at the most from Maukka’s test. Even more so than the CRI. I also look at Rg when the CRI is very high because I like to see saturated colors.

In general, I like to have 0 to –0.003 duv for neutral tint and –0.003 and below for warm tints for indoor use. But like Maukka said duv doesn’t really matter for these since we are not going to edc them.

Thank you for asking that. :+1:

And thank you for answering that!! . :+1: . :beer:

I was just as “clueless” as Jason said he was…… :wink:

teacher, I’m surprise you said you don’t know what duv is because you said earlier you would pay extra for 1107 which as a duv of –0.0001, which is approximately perfectly neutral or as close to the BBL as possible. If it wasnt the duv you were after, why did you prefer 1107?

I had no earthly idea…. :open_mouth: … :person_facepalming: … :smiley:

1107 is, & has been for years; kinda my ’lucky number’…… :slight_smile: .

Nothing more than that. :slight_smile:

I must have missed something, but how did you tell what the “duv” was on that light as opposed to the others?? Just curious. :slight_smile:

PS… After learning this I am somewhat embarrassed I mentioned 1107. :person_facepalming: . :slight_smile:

lol. There’s no way I would have guessed it!

The Duv is in Maukka’s test results.

Never mind SKV89…. I found out how you knew that. I had not clicked on the “measured” link in the post. My bad……

I was posting while you were that I had figured it out. I knew you had not guessed. :smiley: I figured I had obviously missed something… and I had.

But… fyi, I would have mentioned 1107 no matter what it’s duv. Since obviously I don’t know enough about it for it to matter…… :smiley:

I’d like to sign up for a set. TIA

YES!!! Maukka Thank you SOOOOOOOOO Much for doing this!!! Thank you also for making it a TWO color temperature kit!!! The variance between cool and neutral on my cheap meter seems significant!

I will take one of these kits for sure!!!

Plus if there is any chance you might consider measuring another light set for me I would be very interested. I would love to have a set that was tested at a higher output. Something that was stable at like 1000 lumens?

Indeed, I checked into having a company in the US measure some lights in a professional sphere. IIRC they wanted like $300 bucks per light, and that was if I sent them the light. So literally 10 times the money.

There’s usually no reason to measure high output lights for calibration other than having more significant digits in the number. Calibrating with a light measured at 2 lumens isn’t very accurate, especially if your tube close to 1:1 lux:lumen ratio, but 188.3 has plenty of resolution.

Lux meters are linear in their operating range and while some people are worried that their tubes read wrong on higher lumens, that shouldn’t be the case. Even if there’s leakage through the PVC, that will also be linear no matter the output. You just don’t notice it on lower outputs.

I’ll take a set of your calibrated lights too! Thanks! :beer:

Ok, I will just start with the 2 then :slight_smile: I would like to mention this on my Youtube channel if your up for making a few extra lights. This is really a big deal as far as I am concerned. If your ok with that I could use some help pronouncing your screen name….

I’m looking forward to how that sounds like :slight_smile:

Google manages to pronounce it perfectly:
Click the speaker icon https://translate.google.fi/#fi/en/maukka

No, it doesn’t mean tasty. That would be maukas.

I’ll continue providing these if there’s demand and there’s enough of a supply of suitable cheap lights.

I have now ordered enough lights for 30 kits.

The first batch of S2+s hasn’t yet arrived in Finland but should next week. After I’ve tested those, I will PM the first people on the list with payment information.

Thank you for putting this all together maukka. Please add me to the list for 1 set.

Quite a few news articles have appeared recently about the Finns being the happiest people on earth, this one seems to go into a bit more depth than most:

Seeing pictures of maukka’s workbench/space certainly helps me understand the whole concept better, as I know I’d be a heck of a lot happier if I had instrumentation like that!

Nice to see it all being put to good use for the benefit of man/womankind by sharing the peace-of-mind that comes from having properly calibrated equipment with the rest of us.

I’ve been wanting to ask you the same question djozz….???

:smiley: djozz should be pronounced as if I were a really cool dj (there actually is a belgian dj who is not me but who calls himself djozz) , but my actual name is Jos which is pronounced close to “ioss”.