Hello,
I'm looking for a mod to make the nights real dark.
If possible only the torches will give light.

Any mod?

There are a number of night sky darkeners from simple to sophisticated. I use tried-and-true Original Color - Darker Nights (found at Nexus). Lots of folks swear by Weather: All Natural, a major weather overhaul which to my understanding contains a night darkening option. As far as ground lights themselves, that a separate issue. A night sky darkener won't touch those.

You can do a lot with Cyrodiil's evening skies. In addition to darkening them, I added a Nebula for pizazz and the ability to see meteor showers on clear nights.

-Decrepit-

wow, you're not using All Natural? why? O.o

This be off topic, but All Nature and The Elder Council, while not strictly incompatible, do not get on well with each other due to TEC's extensive changes to White-Gold Tower interior. The Elder Council is the very core of my play-through, a primary reason it has lasted as long as it has (1.8k hours and going strong). When I must choose between desirable mods, and All Weather seems quite impressive, The Elder Council wins out.

-Decrepit-

Situations like Decrepit's aside, All Natural is the way to go. I find the 80% darker nights option to be just about perfect, but you can go even darker.