[quote=axg8750;248541]I have been flowering my four plants under two 175 watt metal halides on a timer controlled 18/6 light cycle for five weeks. My 400 watt hps just arrived. I am about to switch to the hps and a 12/12 light cycle. Is there any special methods for doing this conversion, or is a sudden change of light ok? Also, would it be beneficial to leave one of the 175 watt metal halides throughout the flower stage?[/quot

Id veg for a full 8 weeks. You will get a better yeild and most strains do not fully reach maturity untill then. Dont rush. You will be more satisfied with your yeild in the end.
Peace

__________________
Over Grow The Government