Thank you @itwithsm!
Once the light schedule is changed to 12/12 on/off hours, it triggers the hormonal response in the plant that makes it think seasons are changing, and will begin flowering.

If little sacks show, this is male pollen sacks that will burst when mature.

If white wispy hairs show, this is pistils, female indicator. Shortly after it will start producing buds.

If the males are not removed, they will pollenate, creating seeds, and also will lower the potency of the bud.