6 years on a PIR wear marks.

...or rather the complete lack of them.

German made Osram Dulux 18w 835 PL-C lamp on an Osram HF Quicktronic ballast which gives a nice good preheat start.
Converted the coach lantern on the front of my house 6 years ago and it’s still kicking with a lamp that looks brand new.
Hasn’t done many hours as the lamp only stays on for a couple of minutes when triggered but it must have racked up quick a few starts over the years!