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Solar lights have a solar panel, control board, photocell sensor, Ni-Cad batteries and a LED (light emitting diode) bulb. The solar panel captures the sun's photonic energy during the day. This electrical current is stored in the Ni-Cad (nickel-cadmium) batteries. The photocell sensor detects available light and the control board regulates flow into the battery. When the photcell sensor detects darkness, the charge stored in the battery is released to power the LED bulb during the evening. Of a morning, the light is switched off to recharge the batteries. Multi crystalline powered solar lights need full sun to charge however amorphous solar panels are still able to charge in overcast conditions.

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Q: How do solar yard lights work at night?
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