Your plant will not stretch much at 12/12. Reason is that you vegged that sucker for months!
Mostly when you hear of plants adding 50-100% of height during flowering they are talking about
short veg times. A plant 4-5 weeks in dirt has only reached maybe 50% of it's final height if it then
gets kicked into 12/12. A plant that has vegged as long as yours obviously has, has reached 90% of it's final height
before you even switched the lights. I'll bet your plant does not add more than a hands span in height during flowering.
BigSteve.
Mostly when you hear of plants adding 50-100% of height during flowering they are talking about
short veg times. A plant 4-5 weeks in dirt has only reached maybe 50% of it's final height if it then
gets kicked into 12/12. A plant that has vegged as long as yours obviously has, has reached 90% of it's final height
before you even switched the lights. I'll bet your plant does not add more than a hands span in height during flowering.
BigSteve.