I'm guessing the market would self correct this in fairly short order with LEDs which are a natural for 12 VDC supply.
In what world are LEDs natural for 12V supply? They typically drop 2-4 volts across each and any string will have tens of them, Putting them in series makes an easier, lower current load, to interface with medium to high PS voltage,
Perhaps LED suppliers behind the push-to keep demand/pricing up?
The LED makers are betting on residential lighting... I thought all but the cheapest christmas lights were already LED?
JR