Just sharing this for general information. But there’s studies involving red light therapy for slowing macular degeneration. Seems unclear if it works-
Conversely, blue light is harmful. Worth looking into it. Red light is absolutely safe for the eyes IME at any dose. It does feel very good and healthy, for whatever it's worth.
https://www.aao.org/eye-health/news/red-light-protect-aging-...