I see it being useful for people like me with bad eyesight that see better with more light, however, it having a loud ugly fan noise and being entirely DIY is more work than just pointing the desk lamp to the papers. I think I remember reading that higher exposure to sunlight is correlated to better vision outcomes but the mechanism isn’t entirely clear to me.

Also, “dear god oh fuck I can’t see anything in this specific spot because I accidentally looked right at the lamp” seems like a thought that will come up often.