I'm thinking you should be fine, that's based on the very strong likelihood your light/s are not pulling anything like 65 amps. With your engine at idle, the electrical system is not putting out anywhere near it's capacity of something on the order of 55 amps or so, IIRC. When you are running with lights, have a look at your voltmeter from time to time - that will tell you what's going on with the system. There is no problem so long as the voltage doesn't continue to drop. Probably a reasonable benchmark, while running at moderate speed, if the voltage is heading south and reaches 13 volts and falling, you'll know the system isn't keeping up with demand. That's when you do a "load shed" by turning off unnecessary things, at least until voltage stabilizes. No harm, no foul.
But again, the LED mfg's "wattage claims" are so overinflated, it wouldn't surprise me at all if everything works fine as you drive down the trail looking like a Christmas tree on steroids.
But again, the LED mfg's "wattage claims" are so overinflated, it wouldn't surprise me at all if everything works fine as you drive down the trail looking like a Christmas tree on steroids.