I love these, and keep buying more, and putting them in my cars, in the kitchen, workshop, etc. and of course by my bed:
o They're pocket sized.
o They take one CR123 battery (which you can get cheaply in bulk if you shop the internet skillfully).
o The CR123 batteries last a long time in use, and have a much longer shelf life than alkaline batteries, so they're good for flashlights that are rarely used (e.g. in my cars).
o They often come with an unadvertised extension tube that makes a single AA battery fit.
o They're really bright: At night they easily illuminate adequately out to 70 feet.
o They have a SIDE switch for on/off (which I much prefer to tail switches).
o They only have two modes: on & off. So there's no fumbling through multiple brightness or flashing settings.
o They have a very narrow, bright beam which you can easily make into a wide, diffuse spread which works better at indoor distances by covering the lens with some frosted cellophane tape.
o They're only $11 each, so buy several and spread them around.