Comparing 10 different spoons (and a couple flies) to see which has the longest lasting, brightest glow.
The phone cam was set to manual so that the aperture/exposure time didn't continuously adjust. This shortens the time (and number or pics needed) to detect a difference. Otherwise it would be an overnight run.
Note that nearly all spoons had some amount of glow at the end of 5hrs...this video shows the relative difference, but its tough to see the really dim spoons.

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