@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."