This is a simple pummer like design based off a circuit
I found on a random BEAM page.  Again, I do not
know the creator off the circuit.  It uses a solar cell to
charge 3 1.2v NiCad batteries in series, and then at
night uses this stored energy to alternately flash a red
and blue LED encased in the white plastic thing on the
front of the device.

Additional Images (click for larger image)

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