Taiwan to install LED trafic lights
"Taiwan's Ministry of Economic Affairs (MOEA) has budgeted NT$229 million (US$7.0 million) for the next three years starting in 2008 to change the traffic lights in all counties and cities in Taiwan to LED-based ones, according to the Chinese-language Central News Agency (CNA).
Taiwan's Bureau of Energy, under the MOEA, said Taiwan now has 350,000 traffic lights using LEDs as a lighting source, with the remaining 420,000 traffic lights to also use LED lighting in the next three years for a total savings in power consumption estimated to be 85%, CNA said.
After switching traffic signals to LEDs, MOEA will launch a NT$130 million plan to change street lamps at specific roads or areas to LED-based ones, CNA indicated."
They seem to save 89% of their energy and last for ~22 years.