Dale wrote:
If you do change the wingtip bulbs take care. The glass lens used is
easily dropped as you remove the retainer and is expensive to replace.
Been there, done that. G

And under no circumstances touch the new bulb with your fingers! Use
gloves or something (shirt tail?) Oil & sweat from your fingers is
not good for the bulb. In fact, if you have the box the bulbs come
in, that warning is printed (or should be) on the box.