Seldom needed are HID replacement bulbs because once they are in place they have a long life usually. When it is necessary we do have replacements. Sold in pairs only. These are the same version replacements for the HID Kits we sell here on RV Headlights. They match the ballast and will match the brightness of your good HID so you can switch out only one at a time.
Don't Take The Risk With Dim Outdated Headlights On Your RV