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<p>[QUOTE=&quot;brg5658, post: 1299959, member: 29751&quot;]I&#039;m going to go out on a limb here and say that it&#039;s likely more the WATER that caused the corrosion than the light.&nbsp; Any studies relevant to coins which are stored in a DRY, temperature controlled, non-gaseous location but with just photos bouncing off of the metal?&nbsp; BY THE WAY, UV rays do not penetrate ordinary window glass very well.&nbsp; Thus, why your photo-change &quot;transitions&quot; lenses do not work when you are in a car.&nbsp; so if it&#039;s just &quot;ultraviolet light&quot; that is the problem, and not just photons in general, I&#039;m not seeing the relevance here.</p><p><br /></p><p>If nothing else, your gold is obviously fine to display.&nbsp; If these were &quot;multi-thousands-of-dollars&quot; of coins on display I would think a bit more about the question, but they seem to just be run-of-the-mill coins worth a reasonably small amount, put on display for enjoyment.[/QUOTE]</p><p><br /></p>

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