How to automate the removal of night frames from a timelapse?

Question

PowerShell

Hello everyone, there is a sequence of 40,000 frames from a surveillance camera, stretched over a year (the construction of the facility), my mistake is that the frames were taken at night too. Now I want to collect video from these frames, only without night photos.

There is no shooting time in the metadata, the files have the name 192.168.155.18_01_20180220193201668_TIMING.jpg., 192.168.155.18_01_20180220194701568_TIMING.jpg
First I process them in Adobe Lightroom, then I import them as a frame sequence into Adobe Premiere Pro.

I see 3 logical (according to the impact method) solutions:

1. (OS) By file name mask, or by some quantitative indicator, delete cmd, power shell files
   
2. (Lightroom) Some way to calculate them in Lightroom, and exclude them from export
   
3. (Premiere) Cut out strictly known fragments on the Premiere timeline, with a kind of automatic machine, because there are a lot of them manually
   

But I don’t know if any of this is feasible, because I don’t have enough brains, I can only assume that it’s possible ..

Answer 1

The mask is the easiest. Select time intervals for cutting and select\move these files to another folder. But it seems to me that this will not be very correct - in winter the daylight hours are shorter and in summer at the same time something can be seen.
It would be more correct to calculate the average illumination of each frame and cut out those that are illuminated below a certain threshold. I don’t know if there are similar tools in Lightroom or Premiere. And you can write almost everything :)