Light out for territories?

[belly_ttt]

In "No country for old men", I heard them say:
"Where do you wanna go?"
"I don't know"
"Well, you just want to light out for territories, ain't you?"
What does he mean?

[Kraken]

CHIGURH
What airport would you use.
MAN
Huh? Airport or airstrip?
CHIGURH
Airport.
MAN
Well–where ya goin'?
CHIGURH
I don't know.
MAN
Just lightin' out for the territories, huh. Brother, I been there... Well...

This one is an expression that I had never heard before. I'm learning it today, so thank you for bringing it into our attention

"But I reckon I got to light out for the Territory ahead of the rest, because Aunt Sally she's going to adopt me and sivilize me, and I can't stand it. I been there before." -- Mark Twain, Adventures of Huckleberry Finn

Particle physicists are about to light out for a vast new scientific terra incognita. When they do, later in this decade, they will encounter a territory of discovery that many of them have theorized and dreamed about all their lives. This unexplored country is the Terascale, named for the Teravolts of particle accelerator energy that will open it up for scientific discovery.

From the quoted paragraphs above, I infer that "light out for territories" means "explore". Maybe even "wander".

I hope our teachers can enlighten us on this one.