Sofirn C01R deep red [sold out, discontinued]

Well indeed it is, thanks for the heads up!!

I’m not sure if that applies on Amazon? In any case, I don’t have any codes. But for what it’s worth, the price on Sofirn Official was $9-$10 iirc. Only $2 more and you get it in less than a week.

Wish for C01R SST20 670nm

Actually, there is no true 670nm chromaticity bin of Luminus's SST20-DR. The good news is that Sofirn told me they were able to get some with a standard wavelength of 660nm peaking up to 670nm. That should be something in that yellow highlighted bins.

What is the difference between the today existing light and the one with the SST led?

Even deeper red, and SST20 presumably fits the optics better.

First of all, I do not expect any huge differences between those LEDs. They will probably be barely visible. I suppose you may notice a slightly better beam pattern and a bit more brightness on high mode. XP-E2 photo red has a smaller die area than SST20-DR, so the hotspot of the new version should look a bit wider.

I hope to receiving some news from Barry after the national holiday.

Amen… :slight_smile:

Barry was so kind to send me a quick whitewall-shot from his smartphone camera.

From left to right...

Sofirn C01 5mm 670nm (prototype)

Sofirn C01R SST20-DR 660nm (prototype)

Sofirn C01R XP-E2 PR 660nm (series version)

Comments based upon some feedback from Barry:

  • actual perception of deep red color is more intense than indicated here
  • C01R SST20-DR is quite similar in maximum brightness - although actual brightness may differ but needs to be measured using a lux meter
  • hotspot beam shape/profile of C01R SST20-DR is yet to be reviewed in detail as any artifacts cannot be assessed on that picture - for now it looks quite similar to XP-E2 PR
  • production of C01 using the 670nm 5mm emitter may be revoked as the beam shows significant distortions - final decision is not made yet

Thanks for post,I’d like see difference with wider lens.How much degree are stock C01S/R?

I have no idea but I suppose it's something around 10°-15°.

Production of C01R batch #2 will commence as of October 2020.

Not uncommon for 5mm LEDs. Maybe much less dramatic in real world situations? If Sofirn has some stock and decides not to sell the C01 w/ red LED, they need to put the LEDs up in their shop :innocent: .

Is there a time frame for the C01 already?

Agreed. I do expect a less distorted beam shape when used in real-world-scenarios. However, these AAA keychain lights are meant for close-distance lighting, so something between 10cm and 3m max.. I guess with such a distorted hotspot Sofirn simply fears too many complaints of customers. Not sure though how many of this LED were sourced, probably just a bunch for testing.

I would love to take some proper beamshots of this light in actual real-world-scenarios but it's up to them to decide if they pursue developing this version or not. I did not get any information about the new C01 lights yet but the odds look good they will start with manufacturing in October 2020, too.

Fingers crossed.

So I think the far right beamshot is the current run, there’s a few left online it seems at least at Amazon. The middle is the next production version, which looks pretty similar to the present version, and what’s the one on the left? Was there thoughts of making two options going forward, or more likely a single version between those two? Pros/Cons of the three?

Thanks!

Wish for a bit wider hotpost,chance for free spare 45/60 degree lens would be nice

Plus 1 ^^^^

See my post #828, left is a C01 prototype using a maxed-out 5mm LED with 670nm.

Regarding C01 using a low-yield 670nm 5mm LED I can only guess but I presume that Sofirn got also thrilled about the medical effects of deep red light to recover/revive color perception. There is a separate thread here that deals with these effects, discovered and invesigated by UCL, UK.

As the original driver of C01 barely made 1 (one) lumen with that LED, they tried some new driver pushing this LED to more brightness. It could probably be somewhere around 2-3lm with high intensity whereas the other C01R lights were operated on low mode (approx. 0.5lm). However, with only one mode available this brightness is way too high for treating one‘s eyes with deep red light. Should Sofirn manage to improve the beam pattern, I would recommend using a firefly and a high mode here. Moreover, I want to underline that shining light into one’s eyes can be harmful, regardless of its luminous flux or intensity.

I agree and Sofirn is well aware of our desires already. I hope they can offer alternative optics anytime soon.

thanks for the response Lux Perpetua. I’m not looking for a therapy light, but am somewhat interested in a red light. Seems like everyone will have opinions, but the current light vs the soon to come light with the SST-20 are very similar. Its hard to imagine a huge therapeutic (or visual with the same beam pattern) difference between 660nm and 670 nm, but I’m just an engineer.