Hey there, I am currently growing 7 white widow plants in my closet. 4 are about 7.5 inches now and it's been 3-4 weeks since they sprouted and the 2 younder ones are about 2 weeks. They are growing under a 250w Dual Spectrum HID. Should I switch to 12/12 now from 18/6, then sex 'em and kill the dudes now or wait a while longer? The lights are on throughout the night so I can take the younger plants out in the sun in the morning until they're ready to be switched.