The Lionesses led world champions Spain 1-0 thanks to Jess Park’s first-half goal but the arena was plunged into darkness soon after the restart in the second half.
But there were clear signs of improvements against the world champions and Park’s goal, late in the first half, gave England the lead.
England were facing Spain at Wembley in their first meeting since the Women’s World Cup final.
England’s clash against Spain at Wembley was briefly delayed after the lights went out at the national stadium.
Many supporters turned on the flashlights on their phones and there were jeers as the players went to the sidelines during the stoppage.