Besides cost why not run LEDs? Way less load on the alternator for the same light output, less alt load = better fuel economy, though less an issue when crawling at night, lol.
This pic is from the last golf cart I built, the new LEDs are pretty amazing at 18W and $20 on Amazon, lol. The more powerful lights require sunglasses.
http://www.amazon.com/Auxbeam-Waterproof-Off-road-Auxiliary-Driving/dp/B00T62RK1U?ie=UTF8&psc=1&redirect=true&ref_=oh_aui _detailpage_o00_s01