Did i cause my clones to flower with one power outtage!É

So i come home from work and the power was out all day, therefore giving the plants about 12 hours of darkness... Now I have never flowered before but I believe i see a couple hairs on some of the clones... Is this possibleÉ

If so, what do i doÉ 24 hour lightÉ

clones flower pretty easily... maybe bump the hours up... i dont think you wanna stress the plant though