How do I get light

Hint 1 of 4:

There's a headlamp in the Field Office.

Hint 2 of 4:

By the way, don't leave it on overnight.  You can wear it...

Hint 3 of 4:

...but it will go out if you leave it on too long, believe me.

Hint 4 of 4:

It happened to me once.