It'll handle 2 55 watt lights, but that's right at the borderline. I wouldn't leave them turned on if you're gonna let it idling for a while just to be safe. The lights i'm running now are 50 watts, and i don't have any problem with them draining down the battery during the night rides.
I think the stockers are 32 watts or something like that.
The biggest difference you'll notice with aftermarket lights like these over the stock one is the lighting pattern. They'll flood light everywhere instead of projecting it in a focused beam like the stock ones. That's especially nice riding in trails at night so you can see around the corners. The light won't project as far out as the the stock ones though because the light isn't focused into a beam. That's also how the high beams are on the composite lights i put on my s10. Low beam is like a normal low beam, but the high beams are 110 watts each and are more of a floodlight. It's not bad once you get used to it, it's easier on the eyes.
