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Question
How long will it take a potato to turn green when exposed to light?
On display at a grocery store with fluorescent lights on all the time, not very long… can be about a week. Here are some blogs posted earlier:
University of Idaho Extension: Options for Storing Potatoes at Home
Also, the University of Idaho conducted a study inhouse and they received the following results:
It will depend upon the intensity of the light and duration of exposure. It also depends upon what you consider green- any slight hue or green green. Regardless, in our studies we saw green develop between 2 and 4 days, but this was under 23 hour light exposure.
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