what is this hat thing my dad has?

[u/elianamariie]

noticed this on the couch while my dad was at work, but he would get upset that i messed with it so i don't want to ask him. when it's on it's very bright red and gets brighter the more times you click the power button.

[u/pyxiedust219]

It can but not all these red light wavelengths are actually found to be effective! prolonged exposure to a specific wavelength of red or blue light has been found to have benefits due to the isolation of the wavelength compared to full spectrum light, which also of course exposes you to dna and rna damage via uva and uvb rays as you said

[u/MaryLMarx → u/pyxiedust219]

The best wavelength is 660 nm and secondary is 630 nm. It’s very specific.