I saw these 2 new concepts for bike lighting and had to share them. Lighting is the biggest component of bicycle safety in low visibility or nighttime conditions. There is nothing worse than turning your lights and the batteries are dead. This fear typically makes riders pack additional batteries, reflectors, or they just take their chances and ride. These systems are on the wheels and automatically are generating power and make the bike and the roadway visible.

The first is Revolights. Revolights consist of 2 thin  profile LED rings (white in front, red in  back) that mount directly to  each wheel rim (just below the brake  calipers) using a series of rim  specific clips. Power is supplied via a  thin wire to the hub where a  lightweight and slim, USB rechargeable  polymer lithium-ion battery is  held in a special bracket. A small  magnet is secured to the fork to  provide speed and orientation  information to the rings.
They are on prototype  design version 4. V4 currently demonstrates all of the critical  functions: it is simple to install, does not interfere with the ride,  and is fully functioning. But further design  elements need to be tested to get it to a production ready status; i.e. to a place where  it can be used by everyone. This involves construction of a 5th,  possibly 6th, prototype version in quantities that will allow testers to  assure the lights are ready for prime time.
On the road, bike lights contribute to rider safety in two ways:
1) 
lighting - allows riders to safely navigate at night by illuminating their forward path.
2) 
sighting - increases the rider's front, back, and side  visibility which signals their presence (i.e. i am a bike) and location  to those sharing the road.
In 2008: The two most frequent causes for the 52,000 reported bicycle  accidents are collisions with motor vehicles (58%) and individual falls  (30%). Of the 716 reported fatalities, 69% occurred in urban areas and 39% were between the hours of 5 p.m. and midnight. Nearly 70% of all nighttime 
Bicycle-Car collisions are due to inadequate side visibility.
Gizmag   has additional pics and info. The Revolights inventor and two partners   are trying to raise money to take the idea to market via 
Kickstarter. As of this writing, he has more than $26,000 pledged toward a $43,500 goal. Who wants one? $220 is the expected price.
Project Aura: Bicycle Safety Lighting System from 
Project AURA on 
Vimeo.
The second light of note is the Aura system. Again, if you're tired of regular bike lights, check out these two ideas for illuminating your bike on the road,  via the rims. Not only do they look cool, they allow you to be seen from  the side, instead of just the front and back with traditional bike  lights. Safe and sharp at the same time.
  According to Gizmag:  Aura comes from two industrial design sophomores at Carnegie Mellon  University in Pittsburgh, using six groups of three tri-color LEDs  powered by a dynamo generator. The design won 
an international Core77 award for helping address the issue of 
nightime bicycling accidents.
An increase in  bicycle lighting and sighting has the potential to  reduce rider injuries  and fatalities. It's time to provide rider's with  a single bike light  solution that allows them to safely experience the  joy of riding,  regardless of the time of day.