Editing Spotlight's sun that comes with a new scene.

Hi it's a newbie question so I put it here.
When you open a new scene, there is a "sun" behind the spotlight. But when you change a skybox, it's gone. Can I make my own sun and connect it to the spotlight automatically and set the day - night light colors as I wish? Can I edit it?
Thanks!

 

When using the procedural skybox, you can link a directional (not spot) light to the Environment Lighting, and this will make a representation of the sun that matches the light:


Note that in the Lighting panel "Sun" is set to "Directional Light".

To create a new procedural skybox, create a new material and set the shader to "Skybox/Procedural":


In the material, you can customize the colors and the sun:

 

Thanks man! I'll try it