The council’s energy development officer Toni Needham said a private company had been contracted to install a “hydro light” on a footbridge over the River Finn in Ballybofey.
She said that once water levels drop a micro hydro-turbine will be installed under the bridge which links Jackson’s Hotel and the scenic Drumboe Woods.
Water flowing downstream will pass through the 110 watt turbine and generate enough power to charge batteries which will run the 30 watt LED light on the bridge above.
The council is currently piloting a number of technologies as part of their programme for renewable and low energy lighting.
“I think this will be the first in Ireland and it will be interesting to see how it works.