WTS: Calibration lights for DIY integrating spheres / lumen tubes - 64 € -

213 posts / 0 new
Last post
teacher
teacher's picture
Online
Last seen: 5 min 20 sec ago
Joined: 02/23/2016 - 19:04
Posts: 6800
Location: NE & SW Alabama

maukka wrote:
SKV89 wrote:
Are you going to send them based on the number? Since I’m number 5, I would be happy to get 1105 Big Smile
These will be sent in random order. And the number 1101 is already out so you would’ve been out of luck anyway Wink
I’d pay a bit extra for # 1107….. Wink

These are gonna be great & very useful. Thank you again maukka!! Beer

      You never know how a horse will pull until you hook him up to a heavy load. / Paul "Bear" Bryant ~/~\~ "Slow is Smooth, Smooth is Fast"

       Texas Lumens Flashlights  <>   M4D M4X Deals : sign up - save $$$$    ||||

         Rudeness Level /\ mΩ /\ {width:70%} /\ LightWiki /\ LED Tint Chart /\ LED Tint Picture /\ Xlamp size chart /\ BatteryU                   Flashaholic? Need Professional Help???   wink   /\ TheOriginal /\ TAB /\ LightSearch /\ BatterySearch /\ 14500's /\ DiCal                                                       

SKV89
Online
Last seen: 8 min 25 sec ago
Joined: 12/10/2017 - 12:46
Posts: 1957
Location: US
maukka wrote:
SKV89 wrote:
Are you going to send them based on the number? Since I’m number 5, I would be happy to get 1105 Big Smile

These will be sent in random order. And the number 1101 is already out so you would’ve been out of luck anyway Wink

Oh darn. But at least these should be better than the new Gearbest 348 that probably have duv 0.004+

maukka
maukka's picture
Offline
Last seen: 1 hour 48 min ago
Joined: 12/31/2015 - 04:15
Posts: 1545
Location: Finland

There’s more to the light quality than just the hotspot where the data is measured. It might look perfect on paper, but another sample could be better overall. So I don’t feel comfortable promising a golden sample which doesn’t turn out to be one. Certainly I’m not going to charge extra for those.

Yeah, some of them do look subjectively better than others which just goes to show there are big sample differences – part of why this thread came to be. However, ranking them in order from best to worst is counter-intuitive considering their purpose.

JasonWW
JasonWW's picture
Offline
Last seen: 43 min 48 sec ago
Joined: 10/22/2016 - 11:41
Posts: 9055
Location: Houston Texas
SKV89 wrote:
maukka wrote:
SKV89 wrote:
Are you going to send them based on the number? Since I’m number 5, I would be happy to get 1105 Big Smile

These will be sent in random order. And the number 1101 is already out so you would’ve been out of luck anyway Wink

Oh darn. But at least these should be better than the new Gearbest 348 that probably have duv 0.004+


Okay, what the heck is duv and why is it important?

I am clueless. Ughh

Convoy L6 thread with XHP70.2, Texas Avenger FET driver, Narsil v1.2 ramping firmware (old), lighted side switch, SMO reflector.

Supfire L5-S thread with XHP70.2, Texas Avenger FET driver, NarsilM v1.0 ramping firmware, 2 x 26350 cells, lighted side switch. My mini L6! 

Thorfire S70S with MTN FET driver, RampingIOS (D4) and custom lighted side switch.

10 NarsilM user videos for BLF Q8, GT, GT70, GT Mini, Astrolux S43 and ROT66

Texas_Ace BLF Calibrated Lumen tube

Maukka Calibration Lights for DIY Lumen Measuring Devices - Headlight List with prices, specs and features

Jaxmnve M1 Stainless 10180 Keychain light Review  - Lumintop ODF30 Review - Sofirn C8F 21700 Teardown and Review, Sofirn SP33 v2 XHP50.2 Review - My Sofirn Q8 Results - Astrolux S43S 219C Test Results - Lumintop GT Mini Test Results

maukka
maukka's picture
Offline
Last seen: 1 hour 48 min ago
Joined: 12/31/2015 - 04:15
Posts: 1545
Location: Finland

Duv doesn’t matter for these, but it means the distance the tint is from the black body radiator. Bigger number = more green/yellow. Lower (negative) number = pink/magenta.

SKV89
Online
Last seen: 8 min 25 sec ago
Joined: 12/10/2017 - 12:46
Posts: 1957
Location: US
JasonWW wrote:
SKV89 wrote:
maukka wrote:
SKV89 wrote:
Are you going to send them based on the number? Since I’m number 5, I would be happy to get 1105 Big Smile

These will be sent in random order. And the number 1101 is already out so you would’ve been out of luck anyway Wink

Oh darn. But at least these should be better than the new Gearbest 348 that probably have duv 0.004+


Okay, what the heck is duv and why is it important?

I am clueless. Ughh

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.

teacher
teacher's picture
Online
Last seen: 5 min 20 sec ago
Joined: 02/23/2016 - 19:04
Posts: 6800
Location: NE & SW Alabama

JasonWW wrote:

Okay, what the heck is duv and why is it important?

I am clueless. Ughh

Thank you for asking that. Thumbs Up

maukka wrote:
Duv doesn’t matter for these, but it means the distance the tint is from the black body radiator. Bigger number = more green/yellow. Lower (negative) number = pink/magenta.
And thank you for answering that!! . Thumbs Up . Beer

I was just as “clueless” as Jason said he was…… Wink

      You never know how a horse will pull until you hook him up to a heavy load. / Paul "Bear" Bryant ~/~\~ "Slow is Smooth, Smooth is Fast"

       Texas Lumens Flashlights  <>   M4D M4X Deals : sign up - save $$$$    ||||

         Rudeness Level /\ mΩ /\ {width:70%} /\ LightWiki /\ LED Tint Chart /\ LED Tint Picture /\ Xlamp size chart /\ BatteryU                   Flashaholic? Need Professional Help???   wink   /\ TheOriginal /\ TAB /\ LightSearch /\ BatterySearch /\ 14500's /\ DiCal                                                       

SKV89
Online
Last seen: 8 min 25 sec ago
Joined: 12/10/2017 - 12:46
Posts: 1957
Location: US

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?

teacher
teacher's picture
Online
Last seen: 5 min 20 sec ago
Joined: 02/23/2016 - 19:04
Posts: 6800
Location: NE & SW Alabama

SKV89 wrote:
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…. Shocked .. Facepalm .. Big Smile

1107 is, & has been for years; kinda my ‘lucky number’….. Smile . (long story Big Smile )

Nothing more than that. 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. Smile

PS… After learning this I am somewhat embarrassed I mentioned 1107. Facepalm . Smile

      You never know how a horse will pull until you hook him up to a heavy load. / Paul "Bear" Bryant ~/~\~ "Slow is Smooth, Smooth is Fast"

       Texas Lumens Flashlights  <>   M4D M4X Deals : sign up - save $$$$    ||||

         Rudeness Level /\ mΩ /\ {width:70%} /\ LightWiki /\ LED Tint Chart /\ LED Tint Picture /\ Xlamp size chart /\ BatteryU                   Flashaholic? Need Professional Help???   wink   /\ TheOriginal /\ TAB /\ LightSearch /\ BatterySearch /\ 14500's /\ DiCal                                                       

SKV89
Online
Last seen: 8 min 25 sec ago
Joined: 12/10/2017 - 12:46
Posts: 1957
Location: US

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

The Duv is in Maukka’s test results.
https://imgur.com/a/lTYsB7K

teacher
teacher's picture
Online
Last seen: 5 min 20 sec ago
Joined: 02/23/2016 - 19:04
Posts: 6800
Location: NE & SW Alabama

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

maukka wrote:
First BLF348 batch measured.


      You never know how a horse will pull until you hook him up to a heavy load. / Paul "Bear" Bryant ~/~\~ "Slow is Smooth, Smooth is Fast"

       Texas Lumens Flashlights  <>   M4D M4X Deals : sign up - save $$$$    ||||

         Rudeness Level /\ mΩ /\ {width:70%} /\ LightWiki /\ LED Tint Chart /\ LED Tint Picture /\ Xlamp size chart /\ BatteryU                   Flashaholic? Need Professional Help???   wink   /\ TheOriginal /\ TAB /\ LightSearch /\ BatterySearch /\ 14500's /\ DiCal                                                       

teacher
teacher's picture
Online
Last seen: 5 min 20 sec ago
Joined: 02/23/2016 - 19:04
Posts: 6800
Location: NE & SW Alabama

SKV89 wrote:
lol. There’s no way I would have guessed it!

The Duv is in Maukka’s test results.
https://imgur.com/a/lTYsB7K

I was posting while you were that I had figured it out. I knew you had not guessed. Big Smile 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…… Big Smile

      You never know how a horse will pull until you hook him up to a heavy load. / Paul "Bear" Bryant ~/~\~ "Slow is Smooth, Smooth is Fast"

       Texas Lumens Flashlights  <>   M4D M4X Deals : sign up - save $$$$    ||||

         Rudeness Level /\ mΩ /\ {width:70%} /\ LightWiki /\ LED Tint Chart /\ LED Tint Picture /\ Xlamp size chart /\ BatteryU                   Flashaholic? Need Professional Help???   wink   /\ TheOriginal /\ TAB /\ LightSearch /\ BatterySearch /\ 14500's /\ DiCal                                                       

jmm244
Offline
Last seen: 2 weeks 3 days ago
Joined: 07/23/2012 - 22:39
Posts: 168
Location: US North Coast

I’d like to sign up for a set. TIA

vestureofblood
vestureofblood's picture
Offline
Last seen: 53 min 51 sec ago
Joined: 08/17/2012 - 15:21
Posts: 1664
Location: Missouri

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?

In Him (Jesus Christ) was life; and the life was the light of men. And the light shineth in darkness; and the darkness comprehended it not.
http://asflashlights.com/ Everyday Carry Flashlights, plus Upgrades for Maglite.

vestureofblood
vestureofblood's picture
Offline
Last seen: 53 min 51 sec ago
Joined: 08/17/2012 - 15:21
Posts: 1664
Location: Missouri
emarkd wrote:
Bump. With all the drama around here lately about calibrating lumen tubes I can’t believe there’s not more interest in this offering. Lots of us have measuring devices – group-buy sphere or tubes, homemade boxes, whatever – and want them to all yield comparable measurements so we can have more meaningful discussions. This is the best way to accomplish that goal, and offered for a very fair price.

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.

In Him (Jesus Christ) was life; and the life was the light of men. And the light shineth in darkness; and the darkness comprehended it not.
http://asflashlights.com/ Everyday Carry Flashlights, plus Upgrades for Maglite.

maukka
maukka's picture
Offline
Last seen: 1 hour 48 min ago
Joined: 12/31/2015 - 04:15
Posts: 1545
Location: Finland
vestureofblood wrote:
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?

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.

KawiBoy1428
KawiBoy1428's picture
Offline
Last seen: 1 hour 12 min ago
Joined: 04/11/2014 - 18:05
Posts: 3141
Location: The Motor City

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

KB1428 “Live Life WOT”

vestureofblood
vestureofblood's picture
Offline
Last seen: 53 min 51 sec ago
Joined: 08/17/2012 - 15:21
Posts: 1664
Location: Missouri
maukka wrote:
vestureofblood wrote:
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?

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.

Ok, I will just start with the 2 then 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….

In Him (Jesus Christ) was life; and the life was the light of men. And the light shineth in darkness; and the darkness comprehended it not.
http://asflashlights.com/ Everyday Carry Flashlights, plus Upgrades for Maglite.

djozz
djozz's picture
Offline
Last seen: 1 hour 41 min ago
Joined: 09/07/2012 - 17:04
Posts: 13826
Location: Amsterdam

vestureofblood wrote:
If your ok with that I could use some help pronouncing your screen name….

I’m looking forward to how that sounds like Smile
maukka
maukka's picture
Offline
Last seen: 1 hour 48 min ago
Joined: 12/31/2015 - 04:15
Posts: 1545
Location: Finland

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.

maukka
maukka's picture
Offline
Last seen: 1 hour 48 min ago
Joined: 12/31/2015 - 04:15
Posts: 1545
Location: Finland

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.

ImA4Wheelr
Offline
Last seen: 26 min 31 sec ago
Joined: 02/03/2013 - 14:51
Posts: 7821
Location: SC

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

jmm244
Offline
Last seen: 2 weeks 3 days ago
Joined: 07/23/2012 - 22:39
Posts: 168
Location: US North Coast

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:

https://blogs.scientificamerican.com/observations/finland-is-the-happies...

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.

vestureofblood
vestureofblood's picture
Offline
Last seen: 53 min 51 sec ago
Joined: 08/17/2012 - 15:21
Posts: 1664
Location: Missouri
djozz wrote:
vestureofblood wrote:
If your ok with that I could use some help pronouncing your screen name….
I’m looking forward to how that sounds like Smile

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

In Him (Jesus Christ) was life; and the life was the light of men. And the light shineth in darkness; and the darkness comprehended it not.
http://asflashlights.com/ Everyday Carry Flashlights, plus Upgrades for Maglite.

djozz
djozz's picture
Offline
Last seen: 1 hour 41 min ago
Joined: 09/07/2012 - 17:04
Posts: 13826
Location: Amsterdam
vestureofblood wrote:
djozz wrote:
vestureofblood wrote:
If your ok with that I could use some help pronouncing your screen name….
I’m looking forward to how that sounds like Smile

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

Big Smile 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”.
vestureofblood
vestureofblood's picture
Offline
Last seen: 53 min 51 sec ago
Joined: 08/17/2012 - 15:21
Posts: 1664
Location: Missouri
djozz wrote:
Big Smile 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”.

Errr..Ummmm. I’m still a bit confused. Are you saying the whole thing should be pronounced as one word that sounds like “ioss” The D would be nearly silent? For the “ioss” the “I” would lean toward having a “y” sound?

In Him (Jesus Christ) was life; and the life was the light of men. And the light shineth in darkness; and the darkness comprehended it not.
http://asflashlights.com/ Everyday Carry Flashlights, plus Upgrades for Maglite.

djozz
djozz's picture
Offline
Last seen: 1 hour 41 min ago
Joined: 09/07/2012 - 17:04
Posts: 13826
Location: Amsterdam

Yes, no ‘d’ is pronounced in the dutch j , yoss would perhaps be most correct.

Billy X
Billy X's picture
Offline
Last seen: 1 day 17 hours ago
Joined: 02/03/2013 - 05:50
Posts: 557
Location: South of France

Definitly in.You have some serious kit there Mukka.

vestureofblood
vestureofblood's picture
Offline
Last seen: 53 min 51 sec ago
Joined: 08/17/2012 - 15:21
Posts: 1664
Location: Missouri
djozz wrote:
Yes, no ‘d’ is pronounced in the dutch j , yoss would perhaps be most correct.

Learn more here at BLF than I did in high school Grad

In Him (Jesus Christ) was life; and the life was the light of men. And the light shineth in darkness; and the darkness comprehended it not.
http://asflashlights.com/ Everyday Carry Flashlights, plus Upgrades for Maglite.

Texas_Ace
Texas_Ace's picture
Offline
Last seen: 1 hour 54 min ago
Joined: 03/24/2016 - 07:44
Posts: 7885
Location: Everything is brighter in Texas
vestureofblood wrote:
djozz wrote:
Yes, no ‘d’ is pronounced in the dutch j , yoss would perhaps be most correct.

Learn more here at BLF than I did in high school Grad

I was going to say something similar.

I will admit, I have not had a clue how to pronounce either name and just kind of had the rough sound in my head that I knew had to be wrong lol.

Pages