I have a fairly large backyard and no electric lines at all installed. I have a small deck also. Im trying to see what type of lighting is available that used no electric. Throw me some ideas! Thanks

A campfire?
Wood torches?
Kerosene lanterns?
Gas lights?
Battery-operated lights (flashlights)?

Frankly, only the last 2 are feasable nowdays. And both will be more expensive to operate than electric lights.

Is there some reason that you can't install either regular electric lights, or the low-voltage outdoor lights in your backyard?