Have these patterns shown up only in your observation hives?

Perhaps only on the side towards the (stronger) light source?

I am reminded of a moire pattern when I look at the cells,
and I wonder if the effect is unique to an observation
hive environment, and would not appear in a normal (dark)
hive or an observation hive with a cover over the glass.

Consider the heat more than the light.

        jim (who hopes he sheds more light than heat)

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