Just for grins I checked the 1946 Truck Data Book. The original rating for the generators back then was 35 amps. Two Halogen bulbs would consume 4 amps (total) less than the original T-3 bulbs, which drew 7 amps each operated at high beam.
I was curious because I want to use the Halogen bulbs on Sparky and have already added electric wipers, turn signals with emergency flashers, LED tail lights and a cigarette lighter for use as a GPS or cell phone charging port. In the process now of tracking down the power usage for some of these. But, it looks so far like the power draw buget will be within the 35 amps available. This will be a 12volt system with the generator modified to 12volt.
FWIW...the explanation provided in the Electrical section of the Tech Tips link at the top of the Stovebolt Banner above, is excellent at explaining the basics of amps vs Watts vs voltage.
