I’ve recently had the chance to construct my own Lucid Dreaming mask. First I would like the opinions of anybody, and everybody.
Assuming you mean one that blocks out light, I would be all for it. It cancels out any light you may see if you wake up in the early lights of the morning before you need to wake up, but after the sun comes up.
If you mean one that after a few hours shines a lot in your eyes hoping it comes into your dream, then I would question it’s effectiveness. It sounds like just another dream sign, and one you need to learn to recognize.