how much time a plant can survive without light?

Last week i just start 12/12 cycle (to force preflowering) I dont have any lighting system because my house have lots of sun light so every day e put my baby in the closet for complete darkness for 12 hours... my problem is that i'm going out for the weekend (3days) and i don't know if it's better to let her stay for 3 days with no light on the closet or to let them stay at the window and loose all the progress that was made during this week

sorry my bad english i really hope that someone could help me...

Hey bro, I would recomend that you take your plant our of flower before you do any irreversable damage. I tried to flower a plant to force it to pre-flower and It became a hermaphrodite and I had to get rid of it all together. So to answer your question I would give it the bennefit of the light. Let it veg the pre-flowers will come when the plant is ready to go to the next stage.