The lights went out for 360 Bluewater Power customers in Oil Springs Saturday night.
Control systems operator Tyler David says the outage was due to a Hydro One feeder.
"Just before 8 p.m we had a loss of supply from Hydro One. All of our 360 customers that were affected had their power restored at 11:15 p.m."
David says Hydro One probably had another 1,000 customers lose power.