Commercial airplanes' use of lights is significantly different from GA use. In the commercial world, a common SOP is:
Nav lights ON whenever power is on the airplane.
Anti-collision lights ON from engine start (or pushback, if earlier) to shutdown.
Strobes ON when taking the runway for takeoff, until clearing the runway after landing.
Landing lights ON when cleared for takeoff, airborne below 10,000', and until clearing the runway after landing.
ALL lights ON when crossing runways.
Landing and taxi lights as required at night for taxi. Don't blind others with landing lights.