As I said, the bands are just that and inconclusive, if not totally irrelevant, for what you actually want to buy.
If you need a 12V lamp you will look for a 12V lamp - you will not be looking for a low voltage one if American nor extra low voltage one if British.
If you need a 12V lamp you will look for a 12V lamp - you will not be looking for a low voltage one if American nor extra low voltage one if British.