Mark 2 l&k headlights

This is driving me nuts. In my headlight cluster, there are 2 bulbs. A short one with a wire attached, and the bulb cannot be removed. It is held in by a spring clip.

What should I be looking for if I need to replace it?

The wire has a spade end which can be disconnected to completely remove it once the spring clip is undone

It lights up on full beam after the main bulb stops moving

Silly question, I know, but as I said, driving me nuts on the net.