Video: The moment lightning knocks out the lights in Antrim town
A spokesman for NIE said 3,000 homes were without power at around 8.45pm on Tuesday after lightning struck transformers in Ballymena, Ballymoney, Lisburn and Campsie.
The affected homes were spread sporadically throughout Northern Ireland with no one area particularly affected. Engineers were sent to repair the damage.
Clip courtesy of Ciarán Connolly