Unles you plan to install a 24V battery bank, or a a second battery and do some fancy wiring, as well as charge the 24V system whenever you are parked...
You need the 12V. (If that's what they are.) Are you sure it's a 12V and 24V option?
EDIT: yep, it says 24V, you need the 12V!
EDIT2: I'm assuming you have a civilian Jeep, you need to fill in your profile!!
My RHD TJ
equipped... And loving it! - Durty Rok Carolina Offroad
I drive on the right
side, what's wrong with you?
Be very careful with the wife mod. Uninstallation can be extremely expensive. Wife mods have been known to take the Jeep and all other mods during the uninstall process. Also, make sure you service your wife mod properly as often as humanly possible. Wife mods not properly serviced may malfunction or uninstall themselves at any time.