Problems with the rappresentation of lights from IES files

Hi to everyone, i’ve some problems with a night render where the lights from an IES files aren’t correctly rapresented. In particular they are too weak compared with the light created not with IES files.

I tried also to push at the maximum the lumen value of the light source and the value of Artificial light on the Enscape visual settings but it didn’t changed. In the immage there is the IES file i’m talking about. Thanks in advance

if i turn the IES file in a simple spotlight source, that light appears correctly in the scene.