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

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TimMc
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maukka wrote:
What was that, 3-4 months?

Yeah, about 4 months. I thought it may have been lost Party

ArtieT59
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Is it possible to buy calibrated lights anywhere atm? Or does anyone recommend an off the shelf light that can be used? Thank tou!

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beam0
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ArtieT59 wrote:
Is it possible to buy calibrated lights anywhere atm? Or does anyone recommend an off the shelf light that can be used? Thank tou!
I recently got back into flashlights and set up my tube the other day, it seems quite accurate but I’m thinking a calibration light would be a good idea.

So although it’s been 7 months here with no reply, I’d like to know this too!

 

Tom E
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You would have to ask maukka - oops, he hasn't been on for 6 months, or find an owner willing to sell. What I and couple others did was mail the lights around so I had one shot at using them.

ArtieT59
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Tom E wrote:

You would have to ask maukka - oops, he hasn't been on for 6 months, or find an owner willing to sell. What I and couple others did was mail the lights around so I had one shot at using them.

 

I was thinking, if one was able to "borrow" some calibrating lights, and you set up your lumen tube with them. Could you then find 3 lights in your collection that are as stable as possible (one light around 300-500lm, one thrower, and one high power 3000-4000lm) and then take their calibrated measurements. then you would send the calibration lights on their way and know that you have 3 lights that are your "standards" to calibrate the lights off of moving forward. is that a good idea? or not as simple as it sounds?

[FLF] Five Light Friday https://budgetlightforum.com/node/78749

Check out some of my new lights (picture heavy) and quick first impressions of them here: https://budgetlightforum.com/node/77180

My Sft40 beamshots / comparison thread: https://budgetlightforum.com/node/78100

ToyKeeper
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ArtieT59 wrote:
if one was able to “borrow” some calibrating lights, and you set up your lumen tube with them. Could you then find 3 lights in your collection that are as stable as possible (one light around 300-500lm, one thrower, and one high power 3000-4000lm) and then take their calibrated measurements. then you would send the calibration lights on their way and know that you have 3 lights that are your “standards” to calibrate the lights off of moving forward. is that a good idea? or not as simple as it sounds?

Yes, it works fairly well, and it’s a good idea. You’ll probably need to calibrate your light box / tube more than once. Like, it’s usually good to check the calibration before each measurement session. Things can change between, like if the sensor moves even a little bit, it can throw off future readings. But verifying calibration frequently can help avoid that.

Just be sure the reference lights you choose are truly stable… because something needs to be stable to make any of this work.

Tom E
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Agree, could work

chops728
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you could reverse this option —mail a regulated light you own to some one with a calibrated Tube — they could give you some real readings on a light you already own — just a thought

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