At
PR it used to be SOP to turn on the wing lights along with the landing lights just before takeoff and leave them on until TOC. They came on again at TOD and stayed on until vacating the runway. This was applicable day and night!
Now they're on from pushback until 10,000 feet and from 10,000 feet until parking, but only at night.
Speculation about why the SOP was changed ranged from compliance with ICAO SARPs to saving money on light bulbs.