EDR wrote:

I do not know if/that aircraft instrument lighting must be "certified",
"approved" or TSO'ed.

If it ties into the aircraft power, is not easily removed, the aircraft is
certificated, and you keep it in an area within the jurisdiction of the
Teterboro FSDO, installation will require a field inspection by the FAA. Note
that the last time I had to jump through this sort of hoop was in about 1997,
and it's possible that this has changed.

George Patterson
To a pilot, altitude is like money - it is possible that having too much
could prove embarassing, but having too little is always fatal.