Holy cow, I wrote a book!
When I described
using a laptop computer as an impromptu flashlight,
that triggered a lot of comments from people using their
cell phone or PDA as a flashlight.
One nickname I've heard for this phenomenon is
"the $500 flashlight",
$500 being the price of a PDA or SmartPhone at the time
the term was coined.
(I was amused to find that
even Scott Adams does this.)
A few years ago, on a trip to
I took part in a pre-dawn hike into the park in order to
observe the sunrise from
atop Temple IV.
For many people (including me), this was an impulse tour
rather than a planned option,
so we hadn't packed flashlights in our gear.
There were a lot of $500 flashlights on that hike.