SO shitzen...

Im grow area is about 3 feet high and my plant is nearing the top of the cabinet......its been about 2 months since it seeded and has been pruned once....its still in its veg. state

If I were to flower starting next week how big would the final plant be?? would it grow even larger?

Additionally, could I leave the daylight bulbs in the cabinet for the flowering stage and still produce a good yield? Would it encourage more growth if I left those lights in? What are the negative effects of using a 5300k bulb for flowering?