"It's certainly correct that you can use red light as a sunscreen. So if you're going to expose yourself to potentially damaging UV sunbathing, what have you, you can use pre-exposure with red light as a sunscreen. So that definitely works." —Michael Hamblin, PhD with Cameron Borg @ 33:29 – 33:47 https://youtu.be/xel3wZ4uT_c&t=2009