Red light is a top 3 topic Ray touched on. Yea I know he didn't invent nor was he a pioneer, but he highlighted the importance of light balance, exposing a huge rabbit hole for anyone to jump in.

Set up a red incandescent strip years ago and never looked back.

I definitely wouldn't base my decision or research on what a random TikToker has to say, even if they pitch out math as their evidence.

In a situation like this my suggestion is to hunt down more professional research.

As for infra red vs narrow range red vs incandescent, there's a few differences obviously, each one has it's rightful place for certain folks.

@cs3000
May be key to use IR light that includes 8-10 uM wavelength , IR-C
https://www.nature.com/articles/s41598-019-48187-0
which is weird because only a tiny amount of IR-C comes from the sun, and doesnt penetrate skin as well as ir-A or B. but was the wavelengths that worked on mitochondria in epithelial cells

4e1665e9-e423-4dc6-967c-da8be1b716b8-image.png

humans might emit infrared around 9-10 uM though which matches the mitochondria study https://www.researchgate.net/post/What_is_the_IR-radiation_emitted_by_the_human_body

& the embryo study used a lamp "at wavelengths ranging from 1 μm to 14 μm, with a peak at 2.9 μm."