Dawn of the solar panel to make help easier

Faraday Cage - Why doesn't a metal case block this signal?

I try to find/build a small solar panel that charges 8 AA batteries (12 V) in daylight and then at dusk the batteries would then supply an LED light with electricity. The LED is an ember flicker type to simulate a candle flame. This applies to an outdoor display, but I need 12-20 units.
Ideally, I would prefer to buy something, but I can put it together if I know what to get. Everything I have seen is for lower tension.
I could use a lower voltage structure, but I haven't found light enough LEDs.
Any help/suggestions would be very appreciated.

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