hey Red,sorry to hear about your psirens bro!i don't think the lights being on for 24hrs. will turn them male.it does say in the Canna-Bible,that cooler temps...like from 65f to 75f and higher humidity....like 50% and higher,will produce more females.it also says when using nutes before sexed,you want to use nutes with more N than P.this is the method i use bro,and i always get a good female to male ratio.i hope this helps you some bro!!