PoolShark.

As far as I know, the plants will continue to stretch once you switch over to the red spectrum bulbs. There is really no way of stopping that, unless you use some training method. If you pretty much expect your plant to at least double its size by the time its done flowering, that may help you in space consumption.

Hope that helps you out JMann.

Peace.
G_V

*Anything I post on this site is purely hypothetical, I do not grow anything illegal, nor do I condone in any such actions.*