LED lighting is set illuminate another global city as both local authorities and companies around the world make a transition.
Seattle has been chosen to lead a US Department of Energy (DOE) study that incorporates the energy efficient technology, Associated Press reports.
As a result of the programme, a national consortium of cities in the country will establish the best ways to use LED lights and the optimal equipment it should invest in, for the future.
The DOE is providing the city with $200,000 (£129,500) for the initiative - called Seattle City Light - and 5,000 LED bulbs during 2010.
In addition, a further 40,000 will be installed on its streets over the next five years.
A number of cities across southern Europe have already begun using the new luminaire, including the busy Mediterranean port of Valencia, which is being supplied with 4,000 bulbs from Seoul Semiconductor, the world's fourth largest company in the sector.