670nm deep red led helps eyesight

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? :slight_smile:

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.”

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?

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.

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

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.

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 :???: :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. Oh! How and why did I did that? I was drugged, and despite it was a very spiritual thing for me at the time, that couldn't impede subtle negative entities from impairing my judgement.

Tue, 06/30/2020 - 22:31; Tue, 06/30/2020 - 22:44; Wed, 07/01/2020 - 21:17

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.

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

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.

Sounds :-) sexy.

1 Thank

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?

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.

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

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

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?

Hi, Here is what I put together. LED670L - 670 nm LED with a Glass Lens, 12 mW, from Thor Labs. Was like $12 bucks (but shipping was $10) https://www.thorlabs.com/thorproduct.cfm?partnumber=LED670L (Great company, sent free snack pack w/ with my order!) Then I used an old LED flashlight I already had, and mounted the LED670L in it..... Seems to work fine, Then I just added a tube made from aluminum foil tape with the white backing paper still attached on the inside. Will be starting 3 min a day per the article ..... I got it because it was advertised as the 670nm that the article said was used. Here are some pics !https://drive.google.com/file/d/1LmXBZGzt4Pz0pPhUL4P05FrvU4zj2ZPP/view?usp=sharing! https://drive.google.com/file/d/1LS-1QxV1utUEvRNltTPIGL0ClRYqoI5w/view?usp=sharing https://drive.google.com/file/d/1PRrNdLYUNKry1AfkCcXb_1JBviGd3Opg/view?usp=sharing https://drive.google.com/file/d/1_wgNS3Qqy41LoMLZ8vJaHvq0Cu5kTwNr/view?usp=sharing

Looks nice!
I have some more info that may be help you get closer to that study light. In the light they made for the study, the tube attached to the light was designed to keep the light source around 6cm from the eye. Also they also put a diffusion filter into the tube, so you don’t see the point of light.

Funnny, from loking at the picture of the light used in the research, I never would have guessed it was a big showerhead model.

why can’t we just use a zebralight photo red (i could have sworn i just typed that, but my post disappeared). website sez it’s in the 650-670nm range

This is one case — perhaps the only case — in which the showerhead full of 5mm LEDs is better than the equivalently bright single bright chip LED
because the goal is to spread the light across the retina, not produce a single bright point that’s in focus on the retina.
Same reason that LEDs can cause eye damage generally — the eye’s lens focuses the point source LED into a point on the retina.

I’d like to know where to buy a photo red showerhead light, now that I know the researchers used a multiple-LED red light.

EDIT
aha, there’s an AC version: https://www.google.com/aclk?sa=l&ai=DChcSEwj7g8KspbTqAhUmHq0GHRQ_BpsYABBRGgJwdg&sig=AOD64_0wTbmj-ZBY6CB7YjG9ZKYzo_TASw&adurl&ctype=5&ved=2ahUKEwiNrLWspbTqAhXNFzQIHYBQBgwQ8w56BQgBELwB

https://www.google.com/aclk?sa=l&ai=DChcSEwj7g8KspbTqAhUmHq0GHRQ_BpsYABBRGgJwdg&sig=AOD64_0wTbmj-ZBY6CB7YjG9ZKYzo_TASw&adurl&ctype=5&ved=2ahUKEwiNrLWspbTqAhXNFzQIHYBQBgwQ8w56BQgBELwB

21W Deep Red 730nm 660nm 630nm LED Lamp Light Bulb PAR30 E26 E27 Aquarium Plant

Thanks for sharing this info! Very interesting.

Hank is offering SST-20 red emitters with his lights. I might have to grab one.

And lo, it turns out red light is ideal for working at night in your henhouse!

https://permies.com/t/143632/Red-Headlamp-Trick