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Okay, done. I also add there 2 images how it looks like on my computer.

Okay, done. I also add there 2 images how it looks like on my computer.

Thanks. When you render an animation, that is the same as rendering with Final with Preferences->Final Button Settings->Use Combined Mesh ENABLED, where all geometry is merged. In this case Octane emits a difference amount of light from the merge geometry emitters than in non-Final mode, where they are separate mesh nodes. The material Surface Brightness ENABLED option generally fixes this, EXCEPT if the geometry emitters are not square - as in your scene. I don't think there is a lot you can do about this except make sure your emitter light sources are square.

Paul

Unforutalny making light meshes square does not fix the problem.
That only fixed the final render because it looks the same but the animation is still FAR too overlighted. I tried to play with all settings mentioned here again and nothing affect animation. (Only changing light power and exposure, but then normal render looks dark.)

I'm sorry - but the plugin merges all meshes when rendering animations, and this problem is a byproduct of that. So it is something you will need to work around.

Paul