Will bio-LEDs turn trees into illuminating street lights?

The search by scientists for new and greener lighting technology is continuing. After the invention of LEDs and OLEDs, there are now the bio-LEDs. This technology still is in its experimental phase, but it might be a future way of using trees as streets lights

OLEDs: current and future possibilities of these organic light emitting diodes

OLEDs or organic light emitting diodes are a new type of LEDs that can produce paper-thin lights, even foldable.
The principle is well explained on How stuff works.
Examples of designs with this new light type can be found here.

You fade to light is video of an interactive installation by rAndom internationals and Philips Lumiblade, the OLED of Philips Lighting.

Flow: a beautiful and eco friendly concept for street lights on wind energy

Source: Igen Design

As mentioned on Webecoist: true innovation comes from seeing a problem and coming up with a solution that is both simple and creative.
A very nice example of true innovation is the Flow, a design by Igen Design of bamboo street lights working on wind energy. It is not only eco-friendly, but also very beautiful.

On the Igendesign Blog, a video can be found on the making of the Flow lamp.

Green lighting: a beginner's guide

Inhabitat presents Green lighting 101: a beginner's guide to eco & energy efficient indoor lighting (made by Philips). It contains basic, but very useful information on energy efficient lighting, with information on some new developments in lighting products.

Energy Conservation

ECBCS, in full Energy Conservation in Buildings & Community Systems, is a research programme of the International Energy Agency (IEA) that started in the '70s and is still ongoing.

It is a series of international research projects (so called Annexes) on a wide range of subjects from energy efficient ventilation, environmental impact of buildings, building simulation tools, commissioning of HVAC systems, solar sustainable housing, net zero energy buildings, retrofitting educational buildings, electric lighting, etc.

It is a huge (mostly) open source of reliable, academic knowledge. A good starting point for any kind of research project, related to energy in the built environment.