Real A320 ops:
(Airlines may vary)
Beacon - When cleared for pushback or engine start (whichever is earlier) until after engine shutdown.
Nav - On during all day and night ops, including on stand.
Strobe - Turned on at runway lineup until runway vacated after landing
Taxi - During taxi in/out. Often turned off once stationary (holding point etc)
Landing - On from runway lineup until after takeoff. Retract before >250kts
Turn Off - From runway lineup until vacating. Off when gear retracted
Wing - for visual wing inspection in icing conditions or for maximum aircraft visibility