There's plenty of light around? You've just got to find it!
Welcome to the forum!
There's a lot of discussion about whether the environments/ships are too dark/bright at night.
If you mean the general illumination levels, then there isn't much to do about that.
If you mean ship and environment lights, there are no lights for the environment (yet! there are lights on the professional version of Ship Simulator), but there are lights on the ships. These normally take the form of Navigational lights, i.e. Red/Green and mast/running lights. However there are places to download lights for the ships, with cabin lights e.t.c. Try searching this forum, or going to http://schiffsim-welt.marcnet.eu/Forum/index.php?board=37.0 (http://schiffsim-welt.marcnet.eu/Forum/index.php?board=37.0)
McGherkin