To flower a plant from outside, when to start?

So i have two i want to put under 12/12, but cant figure out which is worse interrupting the light or dark so this morning after the sun came out, i put them under my lights, but in the dark. I just want my lights to burn at night and not in the day. So they will sit in the dark till around 7pm, then lights on till 7am, lights off. For what its worth its really dark cloudy out, but still light for 3 hours this morning and back to complete darkness till 7pm.

Is this a big risk, or not a big issues as a one time change to finish shouldn't hermy them? BTW theres no going back, but would like any ideas of what my chances are il be ok? Please an thank you very much:thumbsup:

Oh and the posting with type Rusty was talking about is something id like to know also Weez, thanks:hippy:


:rasta: