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There are plenty of places where I need a book light to read. I use a LED-on-a-stalk case now. This would, possibly, be a better solution (less glare, more even lighting). If you NEVER need a book light now then of course you don't "get" why this is a big deal.
I tried a plastic wedge-light over an E-ink reader years ago. The big issue was poor light uniformity, even more than the slight loss of contrast. So this could be a sweet lighting technique to me.
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