Ahhhh! But you don't rely on a road vehicle's headlights for collision avoidance.
The ability to see a green (or Red) sidelight can be a matter of deciding whether one is a crossing vessel/aircraft or an overtaking one, a give-way one or a stand-on one.
I would argue very strongly in a law case that if someone had cheaply and improperly fitted a marine light system in an aeroplane - against the regulations, simply 'cos it's cheaper, is worthy of the electric chair
Hasty retreat - whilst the writer whips off to aeroplane to check that all is pukka!!
Signed: EGHHZXAC - Life's tough if you don't weaken.