Emily writes:

Can't he just read the regulations? He's obviously got access to
internet.

§ 91.209 Aircraft lights.

No person may:

(a) During the period from sunset to sunrise (or, in Alaska, during the
period a prominent unlighted object cannot be seen from a distance of 3
statute miles or the sun is more than 6 degrees below the horizon)—

(1) Operate an aircraft unless it has lighted position lights;

(2) Park or move an aircraft in, or in dangerous proximity to, a night
flight operations area of an airport unless the aircraft—

(i) Is clearly illuminated;

(ii) Has lighted position lights; or

(iii) is in an area that is marked by obstruction lights;

(3) Anchor an aircraft unless the aircraft—

(i) Has lighted anchor lights; or

(ii) Is in an area where anchor lights are not required on vessels; or

(b) Operate an aircraft that is equipped with an anticollision light
system, unless it has lighted anticollision lights. However, the
anticollision lights need not be lighted when the pilot-in-command
determines that, because of operating conditions, it would be in the
interest of safety to turn the lights off.

Nothing in this quoted section mentions engines, so it doesn't answer
my question.

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