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The lamp you used puts out 88 lumens The USB version only puts out 10 lumens, so you probably made the right choice.
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One possible application you might look into is for communicating with patients in MRI or CAT scanners. Due to the large magnetic fluxes no metal can be used, meaning no electronics, near the patients. I think mirrors are used to display info to the patients. At the very least microfluidic indicators could be used as visual indicators for the patients.
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