Some LED lights are designed to specifically work on AC voltage, so yes.  Hook it up to the wires that went to your headlight and you're all set provided you don't exceed the watt capability of your lighting coils.
LED's and HID's are very close to the same efficiency in producing light, so if you have a 55W LED it should light up about the same as a 55W HID (which is several orders of magnitude brighter than the oem headlight). Problem with the HID is that on startup it pulls way more than the rated 55W, hence the need for a battery and charging system that's over-rated for the continuous current draw.
With a 130W coil, you could easily light up a 100W LED lightbar (provided the rs coils really are 130W) without the need for any electrical modifications to the quad other than the coils.
It's ridiculously simple and ridiculously bright, but there's a catch...they're ridiculously expensive.

My suggestion is to keep a battery on the quad, tucked away, with a bypass plug.
You have one for the stator and one for the battery, so if something happens to the stator or you want to run the lights while the quad isn't...the battery will give you some reserve lighting when you switch plugs.
Don't bother with a charging system unless you foresee using the lights often and carrying a spare battery isn't enough.
A charging system is a lot of work, and definitely worth it, but way overkill unless you want to run HID's or light up the camp site.