So the saying goes, necessity is the mother of invention and here we have an idea that is pretty brilliant (pun intended.) It started back in 2010 in San Francsico with two guys, Kent and Adam. The need? To make cycling safer at night. The result? Revolights. After having the business side of things in place and prototypes developed, a Kickstarter campaign was created and successfully funded in Sept of 2011.
The system itself looks like something straight out of Tron. It is made up of four components, a ring of LEDs mounted to the side of each wheel, a USB rechargable battery, fork-mounted magnet and an integrated accelerometer. The charge is said to last up to four hours, which one would think would be enough time for any type of nocturnal activity. As of now the system fits only a 700c/622mm and 27in wheel, sorry 26ers.
Judging by the pictures on their website, I think that the light thrown out isn't quite as much as a handlebar or headlamp but in areas where street lights are plentiful, the light projected seems like it would suffice. However, the biggest advantage with this product is not so much seeing in the dark, but the ability to be seen.
For more information check out their website revolights.com