How do I know which Diopter strength I should choose for my Magnifier light?

This is a great question and one that can be a little confusing, because the answer is it depends on the task and where you hold the object to be magnified, which we know is different for everyone. The guiding rule that normally applies is that the closer you want to hold the work, the higher the lens power you need. So typically, a 5 diopter lens will work better for crafting, where you need to examine smaller details closely, and a 3 diopter lens will work better for reading, where you can hold the book a little farther away.

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