Which 12v lights?
Both types are commonly found in stores, along with several other low voltage systems.
If it's a genuine 12v light, then you could wire it to a suitable adaptor to CV connect to your 12v power.
If it needs 110, then stick to 110. Unless you are comfortable tinkering with electricity, don't mix and match
IanP, the man from Scotland
Jay Feather 19XUD, pushing a Jeep Grand Cherokee