Thanks to all for the thoughtful replies.
Probably the long term solution would be to convert to 12v, but I was hoping to see how it goes this winter.
I bought a King Kutter 7' blade a few months ago, got some weights as well. Want to see how it moves the snow and slush. The driveway is about 500 feet total. But I am on a county road, so the lights seem to be a good idea, more the better.