Howe confirmed the clubs and referee John Busby had agreed that the match would be called off should the lights turn off for a third time.
However, Howe said after his side's 2-0 loss that Football League officials stated the match must be delayed for 30 minutes in order for it to be called off.
The game was delayed for 28 minutes in total, but Howe was not complaining after the final whistle.
Howe said: "That was what we were told and the referee blew the whistle on the back of the third one, I think.
"But then when we spoke to figures from the Football League, they said there was a half-hour cut off point. I think the game has to be stopped for half an hour.
"We were prepared to go along with that, we had no issues with it."
The Englishman added: "With the floodlights, that was a new one for me but we're not using it as an excuse or any type of reason for the performance we delivered.
"It's a game of football and the lights were obviously off. We didn't know how long they were going to be off for but as soon as they came back on, we were keen to get back and playing."
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