Not sure what you mean by size and wiring. Post a pic or link to the lights you are considering and where you plan on placing them.
In most cases if you add lights it's best to run them on a relay. Even if you are replacing what is there it is often better to run off a separate relay. Older jeeps (just not sure on yours) the lights power run through the switch that cause early burnout of the switch and limits the power to the light resulting in dimmer lights.
Regards,
JPNinPA
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