My landing light should be GE 4522.
Is there a quartz replacement for this lamp?
Is this lamp available from an automotive supplier?



No and no.

They are available as the 4522 from the catalog houses such as Spruce.

They are so robust that owners typically never have to replace them during
their ownership....because they are used so little compared to those faired
into the leading edge (4509).

When you re-install, pay attention to which side the shield of the filament is
pointed. It is meant to protect the pilot from the bright light, but at least
30 percent are 180 degrees displaced and so shine the light at the pilot and
the prop.

Neal