Originally Posted by
bose-x
Landing light on for take off. Landing light on for landing. Off the rest of the time. They have such a short life that you have no idea when they fail so it's just a placebo. On most of the twins I fly it's part of gear so gone on retract.
If the light fails, or has already failed before being selected, you can see it on the Voltmeter or Ammeter (different reading after a failure or no change when selected)
On my Warrior I used the landing light all the time until my engineer pointed out that the wiring was not designed for full time use. Sure enough it burnt out shortly after.