The new batch is now measured and ready. 3 sets of lights are still available.
Hi hcanning, how is your sphere performing, specifically at higher output levels? Reason I ask is that I am seeing inconsistency with mine between lower lumen levels and higher lumen levels as posted here. I see your sphere has a complete opening at the luxmeter rather than just being pressed up against the foam like mine is (see pics of mine posted here). I also am not using any diffusion material in mine, nor am I blocking the entrance hole with anything other than the light itself (and maybe part of my hand at times. I need to figure out what I’ve done wrong with my sphere and how to correct it for more trustworthy results.
Thanks,
-Garry
One more set of 2x Convoy S2+, XM-L2 (low CRI, cool white) and SST20 (high CRI, neutral white) available from the latest batch. Price for the kit is still 67 € including international shipping.
Interested
I need to purchase a calibration kit please, as soon as you can manage. I am located in London.
I am interested in measuring all kind of lights, from 2000K 95+ CRI to 7500K 70 CRI. What calibration kit would you recommend for me? Do you think the CW low CRI + NW high CRI will work well?
Unfortunately I don’t have any lights in stock right now. There hasn’t been much interest lately and I don’t know when I will order the next batch.
I can order what lights you need and have them delivered to your preferred address. Would that work for you?
That’ll work. I’ll hit you with a PM.
Thanks. Let me know the details and I will make arrangements at once 
After rummaging my stock I’ve found one S2+ & BLF348 kit for sale if someone’s interested.
edit: this is now reserved
1 Thank
Lights arrived. Thanks!
1 Thank
Haha, goot to hear! What was that, 3-4 months?
1 Thank
Yeah, about 4 months. I thought it may have been lost :partying_face:
1 Thank
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!
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?
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.
Agree, could work
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