All the current lighting in your sled is incandescent, and it doesn't "care" whether the power is AC or DC. All the electronics on a sled are 12VAC unless/until you get into EFI components or starting/charging systems, which have a rectifier/voltage regulator (I think usually internal to the ECU on newer EFI systems). I haven't ever experimented with LED lighting on sleds, but I've heard some setups need a rectifier or you'll get low or no light output. So you may have to add that somewhere, but the power draw should be significantly less than the current lights.
02 Polaris 600 RMK
Project sleds: 89 Indy Trail, 94 AC Pantera