Energy provider Energia is to supply power to all of the country's street lights under a new €86m deal with the Office of Government Procurement.
Under the deal, which will run for three years, Energia will supply power to about 52,000 unmetered supply power points which supplies power to 480,000 public lights across the country.
As part of a broader sustainability commitment, a programme is also being implemented to overhaul street lighting around the country to remove older lights to reduce consumption and improve efficiency.
The contract agreement, which officially began last November, will run until the end of October 2021.
Energia supplies approximately 25% of the island of Ireland's total electricity requirements and 21% of the island's total wind power.
Alan Mulcahy, Head of Sales at Energia said the company has a long established relationship with local authorities and public.
"By powering all of Ireland’s street lights we have an opportunity to reinforce our commitment to communities and local citizens on a daily basis," Mr Mulcahy said.
He said Energia supports over 200,000 homes, over 58,000 businesses as well as public sector bodies, essential services, community services and charitable organisations.