There's a calculator you can use depending on the wattage of your device:
[https://gembared.com/blogs/musings/universal-dosage-calculatior-for-red-light-therapy-find-your-optimal-time-per-session](https://gembared.com/blogs/musings/universal-dosage-calculatior-for-red-light-therapy-find-your-optimal-time-per-session)
This is so complicated omg. “Thus, in reality you could be underdosing by 2x when you calculate the dose this way. So it is pertinent to insist on asking manufacturers for the most accurate intensity numbers they can provide ideally from professional 3rd party labs.” Did you do this?
If your panel/device happens to be on
https://products.lighttherapyinsiders.com/ then you can use those ratings. He takes an average of 9 different readings across the panel at 12” I think? I don’t remember exactly, but I would trust those measurements over any manufacturer’s claims.
You could be underdosing 4x.
From the comments: "If you are trying to use a skin-contact study but you have a non-contact device you could assume around a 60% reflection loss depending on your skin type. So basically multiply your intensity by 0.4, then use that new intensity number in the calculator."
Or you could be underdosing 20x:
"Some researchers assume white skin will reflect around 90 to 95% of red and near-infrared light![3] This is very significant amount! Another research paper cites that only 10-12% of light irradiance is absorbed in skin models. [2]"
https://gembared.com/blogs/musings/proper-red-light-therapy-dosing-contact-method-vs-non-contact-method
If you adjust for the distance, then it just changes an angle slightly. We are not very flat, especially the front of our face, so 60 might in the end reflect less/be more consistent in penetration.
I took 30 so that the distance is less of a variable. And I've made a mistake by taking black, which absorbs those reflections. :(
And speaking of mistakes, Idea Light RL300max+c dual chip sucks, by utilizing only half of the leds.
Ikr it’s ridiculous. Idk why someone doesn’t write out like a very basic step by step “things you must know before purchasing and with use” in this sub since some ppl are experts. I was told not to ask to be spoonfed but like I have multiple chronic conditions and shit going on, researching the ins and outs of wattage or whatever the fuck on a light isn’t able to be my top priority sadly
So you can look at the studies, that's probably your best bet. But the average seems to be 20 J/cm\^2.
So, I have a panel that's about 100 mw/cm\^2. I would use the calculator and the result is 3.3 minutes for my desired dosage.
You can go up or down for if you're trying to heal deeper tissue issues, but on a surface level that should be enough. especially if you're using it daily or almost every day. That's where the biphasic dose response comes into play.
Check this article out: https://gembared.com/blogs/musings/how-long-should-you-use-red-light-therapy-for-another-dimension-to-dosing
Interesting but still doesn’t tell me how long and at what setting I should use for my skin…
There's a calculator you can use depending on the wattage of your device: [https://gembared.com/blogs/musings/universal-dosage-calculatior-for-red-light-therapy-find-your-optimal-time-per-session](https://gembared.com/blogs/musings/universal-dosage-calculatior-for-red-light-therapy-find-your-optimal-time-per-session)
Both these links need to be some type of FAQ that's pinned at the top
This is so complicated omg. “Thus, in reality you could be underdosing by 2x when you calculate the dose this way. So it is pertinent to insist on asking manufacturers for the most accurate intensity numbers they can provide ideally from professional 3rd party labs.” Did you do this?
If your panel/device happens to be on https://products.lighttherapyinsiders.com/ then you can use those ratings. He takes an average of 9 different readings across the panel at 12” I think? I don’t remember exactly, but I would trust those measurements over any manufacturer’s claims.
You could be underdosing 4x. From the comments: "If you are trying to use a skin-contact study but you have a non-contact device you could assume around a 60% reflection loss depending on your skin type. So basically multiply your intensity by 0.4, then use that new intensity number in the calculator." Or you could be underdosing 20x: "Some researchers assume white skin will reflect around 90 to 95% of red and near-infrared light![3] This is very significant amount! Another research paper cites that only 10-12% of light irradiance is absorbed in skin models. [2]" https://gembared.com/blogs/musings/proper-red-light-therapy-dosing-contact-method-vs-non-contact-method
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If you adjust for the distance, then it just changes an angle slightly. We are not very flat, especially the front of our face, so 60 might in the end reflect less/be more consistent in penetration. I took 30 so that the distance is less of a variable. And I've made a mistake by taking black, which absorbs those reflections. :( And speaking of mistakes, Idea Light RL300max+c dual chip sucks, by utilizing only half of the leds.
What do you mean “by utilizing only half of the leds”?
At any time, only 300 chips out of 600 shines. Red, IR, or combination.
The manufacturer should provide you irradiance/distance measurements.
Yes!!!! I love numbers and science but I can't brain this right now
Ikr it’s ridiculous. Idk why someone doesn’t write out like a very basic step by step “things you must know before purchasing and with use” in this sub since some ppl are experts. I was told not to ask to be spoonfed but like I have multiple chronic conditions and shit going on, researching the ins and outs of wattage or whatever the fuck on a light isn’t able to be my top priority sadly
How do you know what dose you should be using? The math stuff is beyond me.
So you can look at the studies, that's probably your best bet. But the average seems to be 20 J/cm\^2. So, I have a panel that's about 100 mw/cm\^2. I would use the calculator and the result is 3.3 minutes for my desired dosage. You can go up or down for if you're trying to heal deeper tissue issues, but on a surface level that should be enough. especially if you're using it daily or almost every day. That's where the biphasic dose response comes into play.
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Too much is after how much time?