More light, or better light?
A direct reflection can wash out detail. Explore the difference between how much light there is and where the light falls.
Why can a bright lamp make a task harder?
Try the idea
Glare can be uncomfortable and can wash out detail. Where the light comes from matters as much as how much light there is.
Move the lamp to the side and try diffusing the light. Compare how readable the page is as the reflection moves.
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RNIB: light sensitivity and glare