I don't recall if I read about this here on ETS first, but there is the Pak-Lite area light:

Reviewed here:
http://www.kk.org/cooltools/archives/000416.php

There are links from there to two retailers. About $29.95 inc. battery.

Actually, a quick Google brought up their home page, with more options:
http://www.9voltlight.com/

A