670nm deep red led helps eyesight

LED Flashlights – General Info
243

I think there is plenty of research already, to show numerous physiological benefits of a range of frequencies.

I think it is a mistake to think that only 670nm is effective.

I also think it would be a mistake to think only Laser works.

Im happy to know that sticking a sofirn C01R in my nose is not going to cause brain damage, (who in their right mind would do that? lol)
and may in fact reduce brain damage.

So Im enjoying using red LEDs therapeutically. Something I knew nothing about before this thread.

ordered 730nm on 10mm board:

pic is a link

thanks all for the conversations and info sharing

244

I wonder if the eyelids act as a kind of natural deep red filter? Incan lights emit mostly in IR, and so would perhaps have a similar effect though closed eyes? Likewise the sun?

245

The sun probably to some extent, after all we evolved with it, it turns out that we never fully adapted to living sedentary lives inside buildings, thus the high levels of vitamin D deficiency and obesity. Incandescent will have most of the spectrum over 1000nm, you can find black body spectrum simulators in the internet, the fraction between 660nm and 1000nm for 2700K is much lower than for sunlight’s ~5500K.

246

Last month I asked Hank from intl-outdoor.com about XP-E2 Far Red 730nm, and he told me he can get that LED now.

I just placed an order for D4V2 with 5A constant current driver and XP-E2 Far Red 730nm.

247

I have 730nm coming from kaidomain

meanwhile, these are my 660nm options atm
5 , 10, 18 lumens

730nm arrived, I like it a lot for sore muscles, aching joints:

730nm is not useful for illumination, the maximum output on the Titanium T10T is now just 5 lumens. The 660nm in a T10T could reach 75 Lumens… on AA Eneloop…

248

Red Light for migraine

I gave one of my adult daughters, who suffers from recurring Migraine Headaches, a Maratac modded to 660nm Red. She used it for a few minutes yesterday, and a few hours later reported that her headache was gone.

btw, Sofirn C01R (670nm Red), are available now on Amazon.

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Hi jon_slider, maybe anytime soon you can also test Sofirn's new C01 using a 5mm 670nm LED. They just spread the good news on another thread. :-)

Best regards from Germany to New Mexico

250

I have the Fitroch MR35 with RGB leds. Will this flashlight work? Wouldn’t a diffuser or waxed paper distort the color and thus the lights wave length?

Review Review with X-ray image: Fitorch MR35 (18650, RGBW-UV, 1200lm)
Product page https://www.banggood.com/Fitorch-MR35-XP-L2-1200Lumens-5lightcolors-Rechargeable-Portable-UV-LED-Flashlightt-p-1205114.html?cur_warehouse=CN

251

clemence made a red AAA jetbeam HCRI
I wonder what nm that was .
thanks

252

you were already told it is not HCRI when you posted in August:

you should ask Clemence for the info you seek

253

It’s phosphor-converted red, not high CRI.

Maukka has measured Clemence’s phosphor converted amber as having a CRI of 61 at 1800K. The red would be even lower.

In a sense, it’s “High CRI” for a red emitter, but not in the normal use of the term.

The peak wavelength should be about 630nm, per the datasheet. It should look a little different than a regular 630nm red (not phosphor-converted) LED’s, due to the broader spectrum. I think it would look nicer, but I haven’t had a chance to compare. I swore I would finish some other projects before I put in my planned Virence order.

254

I think you mean this E17A

thanks for leading me to that option
I like that the VF is 3.0v, it is a good match for the 4500k Nichia 219b LEDs I like to swap out of a Maratac and Tool

to build a light for Red Light Therapy

Im having an issue using the 660nm Red XP-E2 that has a 2.1 VF. The AAA lights lose their mode spacing…

Clemence was very wise to use an LED that would not have a negative impact on mode spacing, when modding the JetU host

he also researched and provided some truly excellent pebbled TiR

255

The phosphor-converted color E17A emitters are a standard blue LED pump, with a phosphor specific to the color they produce: green, amber, or red. The blue E17A is just the typical blue emitter with no phosphor.

So yes, the Vf is the same as typical white LED’s, also driven by a blue pump.

Unfortunately, I don’t see anywhere that Clemence published what TIR he used, and I don’t think he is selling those anymore. He also does not currently have the 10mm PCB for E21A/E17A in stock to use with AAA lights. I think he plans to restock it eventually, but he’s had a few projects in work that seem to be higher priority, including the E21A/E17A version of the Skilhunt H04.

256

Research was done using 670nm and beyond, I don’ t know whether regular (620 or 630nm) red will work with reduced benefits or not work at all, but there must be a reason why nobody uses 620nm in red therapy lights.

257

I just read through this thread with interest… (I had not seen it before). I am somewhat familiar with some of the physical therapy uses for IR. So I decided to get some LEDs to experiment with.

I found these XP-E Far Red (720-740nm) LEDs at Rapid LED:

XP-E Far Red LED

mounted on 20mm boards and on sale. They also have some 660nm and 720-740nm now in XP-E2.

258

true
there is also research with 620nm and even 530nm (green) has been shown to have benefits

670 just happens to be available inexpensively in 5mm LEDs that the study this thread started with, refers to

it is by no means required that we use just 670nm… there is a considerably wider range of biologically active LED frequencies.

It is also not necessary that we use a single focused Laser frequency

there are studies that tested a blend of 580 to 620nm that also produced therapeutic results…

basically, the energy coming from an LED does have biological effects, and is not in any way limited specifically to 670nm

google is our friend, its not hard to find studies that use many other frequencies than 670nm

just yesterday I researched using LED light for migraine, and one of the first hits was green light. I had to exclude green, to dig up the red light application I posted above in post #248, that used a combination of:

“super pulsed laser 905 nm; infrared 875 nm; Red 670 nm”

I gave my daughter a 660nm XP-E2 light, she used it as posted above in #248, and a couple hours later she smiled and said, “btw, my headache is gone”

==

I have installed XP-E2 660nm and also XP-E2 730nm LEDs in some AAA lights, discussed here and in several posts on the following page from there.

the cliff notes is, my AAA lights lose their modes with XP-E2 Red 660 and 730nm, while AA lights seem to retain them with 660 and 730nm, but 730nm is very very dim

Im presently researching the XP-G3 660nm because there is a report that the XP-G3 645nm retains mode spacing in an AAA mod

I presently use a 730nm XP-E2 in an AA light, sometims at 1 lumen, and occasionally at 5 lumens

and I use 660nm in an AAA light, at 5-7 lumens, and it relieves arthritis and muscle pain for me, just like 730nm does

Ive also been using those lights on my eyes, and lately Im finding I often take my glasses off, and seem to see better than usual, without them…

Im really glad I found this discussion, I had no prior Red Light Therapy experience, and Im finding it very useful

259

Thanks Jon for your contributions to this subject. I have some single mode buck drivers I will use and tune the output around 350-500mA range with sense resistor. See what it will do, I have suitable hosts.

Off subject; I love that part of NM where you live! From Santa Fe to Taos, Georgia O’keeffe country. Some of the most beautiful landscape I have ever experienced. Enjoy.

260

Im indeed extremly fortunate to live here and experience the beauty. I went up to the aspens near the ski area today, with visiting family, including a new grandson. Extremely happy times. Despite corona, wearing masks, and using social distance, it was total soulfood for me to see them here.

I like your single mode red light plan
my opinion is that 5 lumens of 660 nm is plenty
and imo 1 lumen of 730nm is also effective, while 5 lumens of 730nm is imo more intense than necessary, when using the light in direct contact with my body.

for those interested in evidence that other frequencies besides 670nm are biologically active, here is one example of a different opinion:

660nm works better than any other frequency

and from the same link:
“Your mitochondria can absorb red light easily at the 630nm and 660nm wavelengths”

and here is a table of red light therapy products and their wavelengths… you will see biological claims all the way down to 405nm

261

there is an inexpensive 660 nm red light coming available… recommended
sofirn C01R

not affiliated, just a fan

262

Sofirn will also make a C01 with a 5mm 670nm red led. It is not available for preorder yet.
https://sofirnlight.com/c01-aaa-flashlight-5mm-3400k-led-95-cri-p0152.html

670nm beam might look weird.

If the final version still has this issue, you can probably fix it with d-c-fix diffusion film.

I will get one to compare, but I do not believe that there is much difference between a rated 660nm red led and a rated 670nm red led for the purposes of this thread.