[vitd]

Serious question - what happens in fall when the leaves fall off the trees? Also, with a simple light bulb, or even lamp post, it can be replaced quickly and cheaply. (OK, maybe not cheaply for the whole lamp post, but relatively easily.) But planting a tree takes years for the tree to grow. This doesn't seem realistic to me, though it does seem really cool.

Also, how much light do they give off? All of the images on the post are computer generated. I'd like to see a photo of this actually working.

[nine_k]

This probably should not completely replace street lamps, but could help better light some areas that are naturally dark and shady. Trees, instead of concealing the streetlights, would give off some light.

Consider evergreen grasses that could probably be made to glow, too. Such grass could nicely light up park lanes at night. Slightly glowing evergreen bushes growing along a walkway could help one walk at night.

Also, consider how helpful such a natural illumination would be during a power outage, especially when it happens due to a natural disaster. The light might be faint, but it will help people orient themselves, help rescue helicopters recognize the terrain, etc.

[balabaster]

These would look wicked cool down the sides of my driveway - it doesn't need to light the whole thing, but it acts as landing lights... makes it light enough to tell where you're going at least, even if you couldn't read a book by them.

[sedev]

The embedded video does have some footage of an actual plant glowing, but it's tiny. :(

[31reasons]

Our world will finally look like the Matrix with green glow coming from the trees everywhere.