How much lighting can the stock alternator and electrical system take? I'm going to get 2 100 watt fog lights on the bumper and possibly 2 more 100 watt lights in the windshield. Could the factory alternator handle this? I probably won't get the 2 extra in the windshield, but I'm just wondering. Also, how much brighter are the 100 watt fog lights compared to the 55?