First Grow with purchased seeds

So here's a thought--initially this plant was grown fairly tall without any trimming, and the plant was sufficiently lush that maybe the top leaves were shading out the bottom leaves? Could that trigger a switch into flower in the bottom leaves? Thanks for everyone's thoughts so far.

apagones eléctricos o intermitencias en la electricidad? sino debe ser auto, continua con el ciclo de luz sin modificarlo

If the packet doesn't say auto then I'm not sure, she definitely not behaving right for a fem. I would leave your lights on 18hrs then and see what happens.