A plant doesn't start flowering until a chemical builds up in the cells of the plant. This chemical doesn't build up when ANY light hits the plant(except green). Example being,... Plant in a sealed box, ONLY light in the box is the light on a power strip. This plant will not bud!

If you want this thing to flower you need to move it into a closet(or something/somewhere COMPETELY dark) and hang serious stuff in front of the door cracks.

After it does start to flower. You need to maintain this darkness EVERY 12 hour night cycle until the flowering is complete. Indicas can take as little as 7-8 weeks. Sativas take as long as 12 weeks. MANY of these stains put a lot of the real weight on during the last couple weeks of flower too. Cutting early will give weak and small bud.