Power was restored to Penwortham after almost 4,000 homes were plunged into darkness this week.
The power cut, thought to have been caused by a cable fault, affected 3,977 homes across the town.
Engineers worked to restore power after the issue was reported just before 7pm on Monday.
A spokesman for Electricity North West said engineers managed to get a couple of hundred homes back on within 30 minutes, and said that power was restored to all homes by 8.30pm.
He said: “It was a cable fault, and we apologise for any inconvenience caused.”
On Sunday, more than 2,000 homes in Leyland were left without power after a fire broke out in an electrical substation.
Firefighters were called to the incident in Thornhill Road, Broadfield, at around 8.30pm.