what will happend if i interrupt the 12 hour dark period?

+i have a over fer. problem the leafs looking bad and are burning and curling up/down..
im into the second month of flowering..im flowering greenhous white rhino..
the air condition is working 24/7 outside is hot as hell and the moisture is very high

ill be happy for some tips and advise..
ill upload pictures as soon as i can!

One thing is you could stress the plant and turn it hermi. It can happen, it happened to me, after 7 week of flowering one of my "girls" turned hermi. and seeded my other 4 girls, cought it late in flowering so not a whole lot of seeds but there where a few. Good smoke tho. I believe it was a light issue too.

she will morph into a witch and cast a spell on you. j.k lol, but hermie is possible. But i dont use a timer for my lights. i actually jut try to get them on and off within the same hours usually around 9pm off. Some plants can handle stress better than others too so it really depends. But your not gonna kill it by putting light on it every now n then. from my experiences.