I went to the LED light trade show a couple weeks ago. It was way cool. They are making real progress for residential LED lighting.
One technology that I especially liked was phosphorescent lenses that convert blue LED into visible light like a normal bulb. This varies from normal LED lights that combine the three colors to make white.

The good thing about the phosphorescent lenses is that you can use the cheapest LED which is blue. You also don’t have to worry about getting the color mix accurate since you are only dealing with one color.

The phosphorescent lense looks really cool. It literally starts to glow when you put it near the blue LED.

I think this is going to be a viable solution for greening Brooklyn brownstones. I’m talking with Lightolier and Sony to see if we can put show case lights into the green show house.

Here is the phosphorescent cap and the LED: