Around 4,000 LED street lights will be fitted along low traffic and residential roads. This is the result of a three year trial on Northumberland Road and Tekka Lane where 17 lamp posts were fitted with LEDs.
The LEDs are expected to save 30% on energy. The replacement of the street lights is due to be finished in 2018.
The LTA said: "[It is] actively looking into the possibility of using LED technology for higher wattage lighting along major arterial roads and expressways."