Sometimes yes, for a boost. But I mostly don’t need it anymore since I started addressing my microbiome (butyrate, phages, L Reuteri DSM 17938) and added a highly bioavailable copper that directly increases ATP supply and kills pathogenic bacteria, among other things (from a company called MitoSynergy though I think they‘ll rebrand soon - in case you‘re from Europe, it’s sold under „Cu1“ by a brand called Global Healing). Infrared light or curcumin (a bioavailable one, like longvida) do help if I need to be extra smart, but I‘ve since become more cautious when it comes to pushing performance short-term. There‘s no free lunch. So I‘m looking at improving health and metabolism in general.

If the light doesn’t do anything, you might lack some basic building blocks for whatever photobiomodulation does (stimulating cytochrome-C-oxidase seems to be only one of the effects), like copper or other trace minerals (selenium, iodine, zinc), or B vitamins. Hard to say really, energy production in the body seems to be really complex from what I‘ve read. If you have lots of money to spend on health, you could get a hair tissue mineral analysis and an organic acids test, and see what‘s lacking. Former will probably be $100, latter could be 300-500.