Landing lights ON below 10.000 (turn them on upon take-off clearance)

Lights that should be ON during the flight:

Strobe ON (no matter what altitude, the light is there to make it easier for other aircrafts to get a visual on you, switch ON when entering the runway)

Anti collision ON (upper/lower red strobes; 1 per second says "engine start or run)

Navigation lights (position lights) ON, turn these on when aircraft has elctrical power, ie APU or GPU

Wing lights: Illuminates leading edge to scan for ice, not necessary to be ON