I'm not sure if you have read the updated material on the Marshall Protocol about avoiding light. They have found some people are not as affected as others with light. Whenever I go out I wear the new Coppertone Spectra 3, as it is approved for the MP currently and my shades and the sun doesn't bother me at all. I keep my computer screen and tv dim and keep the rooms in the house somewhat dim but by no means am I a cave dweller. My doc says there is more focus on avoiding food with D in it then light currently. The whole protocol is so new that they are learning as they go along. I think its an individual thing as one can tell if lights are affecting them. If I feel sluggish or not herxing that would be a red flag that I'm gettting too much light. This may all be old news to you but I thought I would briog it up since we are both doing the protocol.