Lighting in wc3 editor

[Meai]

Hi, I googled for quite a bit and I cant find enough information on the Day/Night light system in wc3.
What do these models exactly do each? I loaded them in the wc3 viewer and it didnt show anything!

DNCLordaeronTarget.mdx
DNCLordaeronTerrain.mdx
DNCLordaeronUnit.mdx

I wanna make it night or day or add some of my own type of nights (idk, like for example a daylight, then evening with different light and then night and then morning light)

Is that possible? I only found a single tutorial that told me to switch out some .mdx to get all darkness (which i dont understand either, why does it all go dark if i switch out a model file?)
Do these .mdx files contain some huge mapwide light source? Then which one is used by default in the editor (not ingame)? Can I change that too?

 

[PurgeandFire]

Check out this tutorial for some information:
http://www.hiveworkshop.com/forums/3d-modeling-tutorials-282/animated-dnc-light-models-221425/

You won't see anything visually when you open it in the model editor, but try converting it to mdl (if it doesn't turn out right--then you may need to use Guesst's MDLX converter, or even Yobgul's).

Try playing around with the settings--if you have any more information to add, feel free to make a write-up about it!