[RABarrett]

These units have replaceable bulbs, which require their own handling tips. If the bulb is handled on the envelope (glass), the hot spot created will cause the bulb to burst due to uneven heating. I think that if you go to a parts store, they will have the correct ones. Carefully handle them by the contacts only, and install them as necessary. I would wipe them clean first with a clean terry towel, in the event that they were mishandled before you got them. When fully seated, attach the connector and you should be fine. Chances are that the right one died from wear and age. Ray