Trying to make World dark unless you have light-source.

I am wanting to make my world have a transition of night and day. Is there any suggestions on how to make the world dark to where you need a torch to see during the night time?

how’s the torch supposed to light up your scene if you don’t use any lighting?

[you can use 4 sun lamps for ambient light… that rotate and play an ipo to change their color and intensity. Instead of making everything pitch black I’d suggest you turn these lamps blue and only reduce the intensity a little]

Thank you for your help- you set me on the right track.