Lowe,
I play with lights/searchlights* and by trial & error I find that in the world of "Dr. WHOleg"

the night last around ~20:11 to 3:49.
The airport lights are turned on at ~20:11.
In console "tod" (time of day) command report 20:19xxxxxx (%?). 20:10 still twilight.
And the lights are turned off at ~3:49 (3:8231xxxxxx) - start of sunrise.
You have some night visibility for around 30 minutes after start and before end of "night".
20:30 to 3:00 is real dark. What would be perfect
Lorenz blind landings - if this work correctly. Work only partially, outer and inner marks are reported, but the instrument (AFN-1/2) is not able to center on signal and no audible Morse code.
Curiously, if you set 20:10 in FMB is registered 20:09 - so put 1 minute ahead to desired time to get "precise" time.
I try change the height for airport lights, but edit .mis file adding "/hstart XX" dont work.
*The searchlights guys start work at ~20:11 but now (final patch) searchlights use "Infrared" light...
Sokol1