Plants flowering with 24/7 Light?

Was curious if anyone has ever had plants flower with 24/7 MH lighting? Seems I had one for sure, male; and possibly another.. maybe female. I went ahead and switched to 18/6 HPS, pulled the male from the box and have decided to go 12/12 on Christmas Eve in honor of Santa (beginning of week 9).

Once I figure out how to attach pics I'll put them up.

Farmer Rich

some strains are auto flowering

Or you mistaked a pre-flower as a sign its already flowering.

whats the pre flower??