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the LED SPST switch most likely the ground part of the switch is for the little LED that is on the switch,
I have not seen the wiring on the dual color halos but if they are a reverse polarity for the different colors where each wire is power or ground depending on what color you want seems like you would need relays to do it correctly and do a 5 wire set up.
But I do not know for sure since I have not seen them.
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