The light can be hindered, but ultimately it cannot be stopped, because יְהִי אוֹר, "there will be light." The light of Moshe Rabbeinu will be accessible to Klal Yisrael, 464 years after it started shining, with the passing of the Arizal, in 5332.
From this, one can see what will be 420 years after 5366, and eight times 35.750 years after 5500, and what will be 417 years after 5366, and 410 years after 5366, in this year. Slowly, or not so slowly, step by step, the veil will be lifted.
