Advocating having every light switched on for conspicuity in every situation can't be generalised to all aircraft in my opinion. Many landing lights flush with the leading edge of the wing, on some twins for example, will crack or discolour the perspex cover if left on for prolonged periods with no cooling airflow over them. The same is true of some Boeings.
Strobes on any aircraft outwith an active runway is distracting, particularly at night. I was un-nerved on an approach some time ago by an aircraft sitting at the holding point with strobes and white lights on.......the glare worried me that he was about to enter the active; in the end he didn't but it didn't calm my nerves until we had passed him and were on to the touchdown zone.
Strobes on an active runway are an absolute Godsend, day and night. Regarding white lights on below FL100 on commercial aircraft, this conspicuity rule I think was generated by a CAA FODCOM or AIC or something similar so is not operator-specific.
Why has nobody come up with the "go by the manufacturer's POH" yet?
