just wanted to know if there are any cities utilizing LED bulbs for their street lights. i'm curious because if there are, my guess is that LED technology is reaching maturity and perhaps soon we'll be having better options for the home. thanks. 
not seen any over here ( Scotland )
Not street lighting, but I'm in the process of upgrading our industrial plant at work with LED's. The reason has more to do with reliability than with anything else. Even though the modules I designed draw roughly half the power of their sodium or metal halide counterparts, the lighting portion of our electric bill is only a fraction of a percent ($10M a month).
Btw, Welcome Madzedong to BLF!
Most major cities in the US are running small scale tests of some sort. A lot of (mostly technical) colleges are doing the same. And I know Osram has people who do nothing but deal with municipal and (really) large commercial customers that want to "go green" for one reason or another and wonder if LEDs could be the answer to their questions. There are also some cities that will be using ARRA funds to convert existing infrastructure to LED (Mesa, AZ springs to mind; there were a couple of stories about what they wanted to do on Slashdot a while back, if I'm not mistaken).
Edit: Oh, and welcome from me as well. :)
Welcome to BLF!
traffic lights are being converted to LEDs in Germany, as the older incandescent versions are being phased out.
As far as street lights are concerned, sodium dischargers still are the latest craze ATM for the Krauts. But - there's hope: the city of Düsseldorf, too, is conducting small-scale tests with LED street lighting: cluster lamps loaded with 24 Seoul-P4 emitters, emitting 2772lm @ 36W (so they claim). Wanna read more? Here's the public utility PDF: http://www.swd-ag.de/download/beleuchtung_led.pdf
Vectrex, if you read this: do you know of other places in Germany?
Many of the traffic light in my area are LED. They have been doing it for sometime.
Not Vectrex. ;) And I'm by no means an expert but I did talk to a vendor at this year's CeBit about LED streetlights (think mass market). I don't remember all the details but the guy was hopeful about making LEDs the de facto standard for new housing developments within 10 years (some EU thing? I really don't remember). I know Hanover has LED streetlights and I think Stuttgart does as well. He told me Berlin passed for budgetary reasons, even when they were basically offering to install their products at cost.
There are LED lights in a new street (Diego de Holguín) here in El Salvador.
Where is El Salvador? By the way, thank you guys for posting in your answers! I really appreciate it!
El Salvador is in Central America. The map below is from Wikipedia. http://en.wikipedia.org/wiki/El_salvador
There is also some enviromental concern. Most cold color temperatures 6000K+ attract insects like magnet iron. They buzz around untill they die for whatever reason. I't does have a great biological impact. I read somewhere (might as well be BLF) that cold light sources will be banned for exterior lightning very soon. That's why there is not so many leds since warmer fragrances are quite more expensive. Probably...
There is some evidence that too blue light is bad for people - but all of the useful information is behind very high paywalls. All I've been able to find from public sources is short abstracts saying blue light may be bad for people. Much more data is needed before anyone can be definitive on this.
I'll take a dig through the journals at work to see if I can find anything useful.
Aloha and welcome to BLF madzedong!
Personally I think street lighting should be done away with... Every time I've lived in the city, I've wanted to get rid of the #$@#ing street lights that lit my house up at night. And when driving, you're out on the freeway, eyes adjusted to the dark, then get to an interchange and they've got street lamps all over the place making it hard to see anything. Or you're in the city, on a block with street lamps, but the next block doesn't have any, so you can't see the next block, as you're eyes are adjusted for the street lights not your headlights. Not to mention how much harder it is to see headlights, bike lights, etc when there's streetlights flooding everything.
Street lights were a good idea when people walked or rode horses, and the closest thing you had to a flashlight was a hurricane lamp. Now people drive, all vehicles have bright headlamps that can see well ahead, and you can buy a flashlight a thousand times brighter than any portable light source that existed a hundred years ago for $10.
The most energy-saving street lamp is one that doesn't exist...
--Bushytails
Ohh, and light pollution too! Another reason to get rid of them...
Yeah where is El Salvadore ??
I forget where I heard this but hey had converted the street lights to Led's and it snowed and the led's didn't heat up and mlt the snow so people were driving thru intersections .. They had to retrofit a heater into the light .. this might be an urban legend .. but i like it either way .. makes for a great story .:P
Where is manila?? and where's that waldo guy
We don't have maps in the US america and such .
Manila is in the Philippines. Interesting. So there are a lot of different concerns when it comes to LED lights and the environment and stuff. But are LED Lights advisable to use at home? Or for the exteriors of the home?
led street lights are expensive, i don't think it's fit for personal
I heard last week a suburb near me will be trialing them. I would like one for a workshop light.
LED spot lights, bulbs will be used in personal houses for sure in the near future, it's a trends to be like that.
The price will be somehow a bit higher than the normal ones, but it saves a lot. &green. 
I know a bit because I am working in a LED lighhting factory in China.
LED spot lights, bulbs will be used in personal houses for sure in the near future, it's a trends to be like that.
The price will be somehow a bit higher than the normal ones, but it saves a lot. &green.
I know a bit because I am working in a LED lighhting factory in China.