670nm deep red led helps eyesight

45 posts / 0 new
Last post
Alen
Offline
Last seen: 16 hours 49 min ago
Joined: 04/03/2012 - 08:26
Posts: 327
Location: Italy

Barkuti wrote:

jon_slider wrote:

Estimated Delivery on 09/24


I will think it over



 


Selecting same shipping option for both items means shipping gets combined.


This store have a lot of Red Leds Hard to find wich are originals Cree,maybe the more expensive
Rasquera_tropical
Rasquera_tropical's picture
Offline
Last seen: 14 hours 44 min ago
Joined: 06/30/2020 - 10:18
Posts: 5
Location: Rasquera, Spain

Right, thank you!

I’ve just found that RS componentes in Spain has a whole list of LED products, from reputable manufacturers with datasheets and so on. Then there’s no crazy delivery costs for me as I’m based here.

https://es.rs-online.com/web/c/?sra=oss&r=t&searchTerm=670+nm+led

I still think a flashlight based solution would be the most practical one though. Does anyone have any good info about making custom flashlights for a beginner like me? Smile

Rasquera_tropical
Rasquera_tropical's picture
Offline
Last seen: 14 hours 44 min ago
Joined: 06/30/2020 - 10:18
Posts: 5
Location: Rasquera, Spain

I’ve just got my hands on the paper that the scientists published… The only thing they say about the light they used is this:

“670nm light devices were based on simple commercial DC torches with ten 670nm LEDs mounted behind a light diffuser embedded in a tube that was 4cm in diameter.”

iamlucky13
Offline
Last seen: 6 hours 2 min ago
Joined: 06/22/2018 - 09:18
Posts: 781
Location: USA

Rasquera_tropical wrote:
I’ve seen the same press coverage regarding this. I’ve got eye issues and I support myself and my family doing graphic design and it’s a great worry as I get older. I want to look into this to support my eye function going forward.

There’s not much info about how to make a 670nm red light source, though you can buy them for upwards of 100 EUR. I’m certainly no technical whiz, but any tips gratefully received.

Thanks!

Sofirn is producing a limited run of a AAA-powered 660nm red light.

That’s really close in wavelength. As I posted further upthread, the study leaves a lot of questions open. One that I didn’t bring up is if this effect is corroborated by future research, whether there is anything special about exactly 670nm, or does it apply to a range of deep red wavelengths?

arek98 wrote:
We are already taking here about 10W LEDs like SST-20-DR. Does anyone know what power is actually needed? Maybe couple 5mm LEDs is enough?

This is another one of the questions raised by the reporting on the study.

I checked the academic journals that my local library has access to, but this paper did not appear in a search, so I can’t see if they detailed what intensity they used.

For a 10 GBP light, I doubt they’re driving it at 10W.

Rasquera_tropical wrote:
I’ve just got my hands on the paper that the scientists published… The only thing they say about the light they used is this:

“670nm light devices were based on simple commercial DC torches with ten 670nm LEDs mounted behind a light diffuser embedded in a tube that was 4cm in diameter.”

Ah, thanks for finding that. I’m betting they’re 5mm LED’s swapped into a 3xAAA light.

Rasquera_tropical
Rasquera_tropical's picture
Offline
Last seen: 14 hours 44 min ago
Joined: 06/30/2020 - 10:18
Posts: 5
Location: Rasquera, Spain

Call me anal, but I think I’d want to stick to 670nm precisely. Most likely 660 is close enough, but I don’t really want to take the chance.

Barkuti
Barkuti's picture
Online
Last seen: 12 min 51 sec ago
Joined: 02/19/2014 - 14:46
Posts: 5048
Location: Alhama de Murcia, Spain

A 660nm red led still has enough emission at 670nm as to be considered a valid 670nm source, too.

As an example, according to the Cree XP-E datasheet peak wavelenght range for deep or photo red emitters ranges from 650nm (P2 group) to 670nm (P5 group). If frequency is so important careful emitter selection and testing is mandatory, or sourcing some precise group emitter batch.

In any case, let me tell you that deep red frequencies won't damage your eyes. Well, maybe if you do something Question Facepalm @#$%. For example, many years ago I did the “exercise” of directly staring at the sun with my naked eyes, for 1 - 2 minutes maybe, 2 - 3 times in a few weeks. Yes, my eyes got damaged. Macular degeneration, in fact. But I never doubted it would heal, and refused to go to any @#$% doctor. Just took a crapload of meso-zeaxanthin, zeaxanthin and lutein supplements for a few months. And my eyes healed. Period.

Tue, 06/30/2020 - 22:31; Tue, 06/30/2020 - 22:44

The Light Innocent I am

Deleting a post and redoing it causes the forum thread answer notifications to become invalid. Thus, if you need to change your just published post, edit it. Thanks.

Please avoid quoting lenghty posts, namely with nested quotes. Trim the quote down to the essential. Helps with forum neatness and legibility. Thanks.

Phlogiston
Phlogiston's picture
Offline
Last seen: 1 day 1 hour ago
Joined: 10/27/2016 - 16:57
Posts: 945
Location: Scotland

iamlucky13 wrote:
Rasquera_tropical wrote:
I’ve just got my hands on the paper that the scientists published… The only thing they say about the light they used is this:

“670nm light devices were based on simple commercial DC torches with ten 670nm LEDs mounted behind a light diffuser embedded in a tube that was 4cm in diameter.”

Ah, thanks for finding that. I’m betting they’re 5mm LED’s swapped into a 3xAAA light.

Yep, my thought too. You wouldn’t need ten high-power emitters to get an eyeball-safe level of light, even with the diffuser.

The diffuser is crucial. You should never stare directly into a modern LED, even if it’s “only” a 5mm one.

A 1mW laser is enough to do permanent damage to the retina. 10mW of LED light from the tiny chip you get in a 5mm LED is intense enough to be pushing your luck when combined with the focusing effect of the 5mm LED package.

If you experiment with this stuff, please play it safe with your eyes.

Having said all that, it occurs to me that using high power emitters with a diffuser to light up a whole room might be a safer way of getting a similar light exposure without having to look directly into anything.

Sari33
Offline
Last seen: 9 hours 42 min ago
Joined: 07/17/2019 - 05:43
Posts: 147
Location: EU

lightdecay wrote:
I have both Emisar D18 and Emisar D4V2 with deep red SST-20-DR emitters. They are fun to use, and quite bright! Smile

For a small fee, Hank from intl-outdoor can build a flashlight for you with custom emitters. I emailed him and asked for SST-20-DR-B120-V660.

Note that the human eye is significantly less sensitive to deep red light, so if you get a flashlight with only 1 deep red LED it won’t be very bright.

Yes considering the lower sensitivity of human eyes to Deep Red light, I’m curious see how will be the output of the C01R .
I hope the boost driver would be very efficient and optimized for this Red Led
but I don’t expect miracles from an AAA light

Barkuti
Barkuti's picture
Online
Last seen: 12 min 51 sec ago
Joined: 02/19/2014 - 14:46
Posts: 5048
Location: Alhama de Murcia, Spain

Some of you seem to be taking this too seriously, don't you? The eye care thing, I mean. Some people here speak about “permanent damage”, but there's no such a thing unless you are a jinx or just chose to learn from the wrong person. I know what I am speaking of.

Everyone around here has had hair in the crotch for enough time already. Be responsible for what you do, and deal with its consequences. It's that easy.

Phlogiston wrote:

Having said all that, it occurs to me that using high power emitters with a diffuser to light up a whole room might be a safer way of getting a similar light exposure without having to look directly into anything.

Sounds Smile sexy.

The Light Innocent I am

Deleting a post and redoing it causes the forum thread answer notifications to become invalid. Thus, if you need to change your just published post, edit it. Thanks.

Please avoid quoting lenghty posts, namely with nested quotes. Trim the quote down to the essential. Helps with forum neatness and legibility. Thanks.

lightdecay
Offline
Last seen: 3 hours 25 min ago
Joined: 06/17/2019 - 08:55
Posts: 175
Location: U.S.A.

Barkuti wrote:

Some of you seem to be taking this too seriously, don’t you? The eye care thing, I mean. Some people here speak about “permanent damage”, but there’s no such a thing unless you are a jinx or just chose to learn from the wrong person. I know what I am speaking of.

Your experiment with staring directly at the sun seems quite extreme, I would love to know more. What exactly did you see? How did it progress as you kept doing it, and what happened when you stopped? Why did you stop?
nwind
Offline
Last seen: 1 day 6 hours ago
Joined: 06/30/2020 - 18:55
Posts: 1
Location: Seattle

Don’t forget about the eye safety. Higher power is not necessary the best and can harm eyes because we can’t see it well and can’t react appropriately.
Just make sure it’s intrinsically eye safe even at the minimal distance.

Barkuti
Barkuti's picture
Online
Last seen: 12 min 51 sec ago
Joined: 02/19/2014 - 14:46
Posts: 5048
Location: Alhama de Murcia, Spain

lightdecay wrote:

Your experiment with staring directly at the sun seems quite extreme, I would love to know more. What exactly did you see? How did it progress as you kept doing it, and what happened when you stopped? Why did you stop?

That happened nearly 11 years ago. What I saw was not of this world, or what others would call hallucinations. By the time I often painted the town red on weekends, and it involved the use of research chemical substances (in early 2008 I was one of the mephedrone pioneers in my country, daring to get a 100g bag of that Facepalm «lovely» substance). I had already attended drug rehab centers, plus many visits to the hospital caused by overdoses, when that happened. It was a @#$% time. Luckily, years later I could reprogram my mind to dismiss the involved negative entities (with paid help).

The progress of the illness was quite fast, although not evident at first. It settled quite fast once I started to notice it, with a prominent small blot in the center of my eyesight and perceptible barrel distortion. To be able to read I learned to focus close to what I needed to read, i.e. when reading from my laptop screen I focused over some letter or word but actually read a tiny word or 2/3 letters before or after. Of course, Facepalm I stopped doing that!

Wed, 07/01/2020 - 21:59

The Light Innocent I am

Deleting a post and redoing it causes the forum thread answer notifications to become invalid. Thus, if you need to change your just published post, edit it. Thanks.

Please avoid quoting lenghty posts, namely with nested quotes. Trim the quote down to the essential. Helps with forum neatness and legibility. Thanks.

Nachtfeuerzeug
Nachtfeuerzeug's picture
Online
Last seen: 4 min 23 sec ago
Joined: 08/31/2013 - 16:10
Posts: 518

So, can the WK30's red frequency be beneficial in light of the subject here? Wink

EDC

FW3A, SST20 4000K || S21A, Crescendo MTNdd 20mm, LH351D 4000K || SP32A, SST40 5000K

Recent/ongoing Mods:

S2+, TexAven 17mm, LH351D | S21A, Crescendo 20mm, LH351D 4000K | L2 w/6A 20mm SST40 driver, XP-L HI | C8+ OP, DD XHP-50

SP32A w/SST40 5000K | SK Zoomie Nichia 5000k, C2 driver | EagleTac clip | Ultrafire C2 w/5A 17mm & XM-L2 | Nichia 219C 2700K with gray S6 |

Reviews:

Sofirn SP31 v2.0 Tactical Flashlight (Cree XPL HI) || Sofirn SD05 Scuba Diving Flashlight || Sofirn SC31 USB Rechargeable (XP-G3)

jayng
Offline
Last seen: 1 day 1 hour ago
Joined: 07/01/2020 - 22:55
Posts: 1
Location: Los Angeles

Thanks for the lead, I just ordered one online. Curious is Sofirn a reputable company? I’d hate to zap my eyes with a questionable product. Newb question, but how would we confirm it is indeed a 660nm?

Pages