Biohacking self-improvement light therapy supposedly to reduce inflammation. It has an immediate and noticeable effect on me, strong enough that I doubt it's just placebo. It started when I suffered long-term low-level pain in my ankle several months after twisting it (I hate aging!), and read how light exposure at the right wavelengths could help. My ankle did improve, although of course this might have been just natural healing. Then I started to consider other possible benefits of light therapy such as reducing inflammation in the brain. See this video.
This thread is for asking any questions that might seem obvious, tangential, silly or what-have-you. Don't be shy, everyone has holes in their knowledge, though the fewer and the smaller we can make them, the better.
Please be respectful of other people's admitting ignorance and don't mock them for it, as they're doing a noble thing.
To any future monthly posters of SQ threads, please remember to add the "stupid_questions" tag.