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

BLF Special Edition Products
314

That looks pretty similar to a JoshK Sphere. You probably want a filler panel that can go around your smaller lights and has a reflective panel to keep light in.

Mine is only good for about 900-1000 lumen before the meter gets saturated, but you can use a neutral density filter for higher powered lights.

315

I’ve actually been using some foam that I’ve cut to shape to stuff in the input hole which I use for small lights but just didn’t photograph it.

I have used some white paper over the holes to reduce the light saturation and might double up on it a couple more times. Is this acceptable as a cheaper (!) alternative to an ND filter?

Thanks!

316

White paper is probably fine but it will age and it’s not very durable. If you take care to keep it in good condition and not adjust it then it should be OK.

As JasonWW was trying to explain: Try white paper or foil on the underside of your foam and re-test a small light. I’d bet your readings will change some due to the foam absorbing some of the light instead of “integrating” it back into the sphere.

317

Thank you - I’ll do some fiddling. Maybe I’ll make some little white cardboard inserts for various head sizes.

318

Please put me down for one. Thanks!

319

Five sets of 2x S2+ (CRI95 SST20 & CRI70 XM-L2) have arrived. I’ll have them ready to go soon.

If you need a thrower for integration testing, PM me. Shipping them internationally is expensive.

Unfortunately due to PayPal fees, shipping and more frequent customs charges I’ve had to raise the price from 64 € to 67 €.

320

The new batch is now measured and ready. 3 sets of lights are still available.

321

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

322

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.

323

Interested

324

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?

325

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.

326

I can order what lights you need and have them delivered to your preferred address. Would that work for you?

327

That’ll work. I’ll hit you with a PM.

328

Thanks. Let me know the details and I will make arrangements at once :slight_smile:

329

After rummaging my stock I’ve found one S2+ & BLF348 kit for sale if someone’s interested.

edit: this is now reserved

1 Thank
330

Lights arrived. Thanks! :slight_smile:

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331

Haha, goot to hear! What was that, 3-4 months?

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332

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

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333

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