I have made a pretty complex scene in Blender 2.82.. I used an HDRi to barely light a scene(strength 0.05).. I just wanted my scene to be lit by street lamps with an emission shaded ball inside the lamp post… Test renders were as expected.. the scene got fully lit by the lamps..
But after I made a few more changes to the scene ( not touching the light sources ).. The scene was dim and dull.. when I increased the strength of brightness to crazy high.. it still did not light up the scene properly..
I did not make any changes since I made the test render.. but now, it does not work as intended..
The test render that was qualified:
After the changes:
Just to mention, I did not make any changes to the scale or move or anything.. I literally just appended new meshes for grass to be used as particles in the field present in right side..
The link for the scene: https://drive.google.com/file/d/1E0inbkPYmTTkzVnRi2sR15HU8w-BSiIj/view?usp=sharing
Edit1: After testing I found out that any value from 1 to 15000K, does not help in lighting up the scene.. it behaves like EEVEE.... the above render was done with 20K strength.. but still not illumination... Edit2: I tested spot lamps and they do not light up the scene as well..
Expecting Your help..