When it comes to applications, the iPhone has it all. Want to control your TV? There's an app for that. Want to find the nearest Chinese restaurant? There's an app for that. Want to record your bowel habits and share them with your friends? Unfortunately, ditto. No, we’re not kidding. It’s called Poop the World and for $1.99, the app combines the iPhone's GPS power with your own notes to create a public diary of your private business.

Now Bright Light, a concept app created for Ray Ban by students at Swedish Berghs School of Communication, has got us wondering whether it’ll flourish or join the likes of Sexy Girl Talk and Zips. Bright Light is based on a pretty simple formula — nobody is really interested in branded apps, unless they have a real life purpose.

Bright Light targets city dwellers who don’t often see the sun and helps them finds the sunniest spots nearest to them. Using the building height and the sun’s path, Bright Light calculates where the sun will be shining at certain times during the day.

Not only does the app show you the brightest spots near you, it suggests cafes, restaurants and other spots from which you can enjoy the sun, all with their specific sun hours indicated. If getting to the nearest sunny spot requires a bit of a walk, Bright Light’s Sun Walk function finds you the sunniest (but not always the shortest) path to your destination. Not to mention the timeline, which you can drag to get an overview of the sun’s movement throughout the day and the predicted sunny spots.

Bright Light is still only a concept but is already stirring up a bit of controversy, since it seems to be the parasitic twin of Coppertone’s Sunsight app — right down to the video.

Maybe this is just another app that you will decide you can live without. Then again, maybe a few more days of haywire weather will be all it takes to get you to change your mind.

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