On/Off timing for airport lights

I am wondering why airports are in (almost) total darkness even when there is
heavy precipitation and low overcast clouds during “daytime”. I would imagine
that airport authorities would turn the lights ON during such times to avoid
unwanted interactions between aircraft and ground service vehicles/personnel.
I think the simulator only takes daytime hours into consideration to switch
lights off/on.

Yes, the only way to solve that is putting lights as simobj and choosing
day/weather, etc to show it

How can you add lights to simobjects? Wasn’t it only for light rows?