Emergency Flashlight for Preparedness . . . where did I put that !?

The Panasonic BF-541 Emergency Light, which is powered by two D-cell replaceable batteries (sold separately), can be easily wall-mounted anywhere fast access to lighting is needed. An automatic switch feature turns the Emergency Light ON automatically when removed from its holder.  The light will glow up to 18 hours with its high-luminance krypton bulb when used with alkaline cells. If you replace the lamp with an LED you can probably extend the run time further (why didn't they think of that?)

To save battery power when not in use, the battery is disengaged and the light goes OFF when returned to its holder. Because there is no switch, it encourages users to return it to a location where it might be found by others rather than just laying it down and forgetting about it.  The exterior case of the flashlight also has a little  photoluminescent  marking dot which glows in the dark, making it a wee bit easier to find when the lights go out.  I think I'd put a BIG honking strip of photoluminescent tape down the side to make sure that it is visible.

Other flashlights of interest might be:
http://theatresafetyblog.blogspot.com/2010/02/jumpin-jack-flashlight.html
http://theatresafetyblog.blogspot.com/2010/02/were-dark-on-mondays-and-when-power.html