Beamer is an iPhone case with a built-in LED light you can turn on to use as both a light and a camera light.
It is a hard-plastic, two-piece design, equipped with a replaceable coin cell battery that provides about 10 hours of illumination. Pressing the button once will turn the light on for 10 seconds, pressing it twice will leave it on indefinitely, and a third press will turn the light off.
The Beamer will be available in a range of colours, and is currently available for pre-order priced at $32 USD.
I am not sure how effective this case/light will be, but for more information or to pre-order it then head over to the developers website.