In terms of the amount of light going into your eyes, my intuition says that you’re getting more nits from a white sheet of paper than from a dark screen with w

In terms of the amount of light going into your eyes, my intuition says that you’re getting more nits from a white sheet of paper than from a dark screen with white text (in direct sunlight) But staring into that light for a long time will tire your eyes no matter if it’s reflected or projected.