the can bus is a data network that has a micro processor/network/data acquisition function on each node. On the headlight node it measures voltage/current to detect a burnt out bulb. I do not know the settings that make this function works. I suspect but do not know there are the same settings in the directional or tail light nodes...so quite low.
I suspect that you will have no problem with a "low amp" head lamp. try it you can do no harm in just changing the bulb.
I think the can bus will work with this just fine