how to make node Stretch much less?

Hi I want to now how to make node Stretch much less? for more yeild.Btw do you need to worry about that in autos?

You need to worry about it with every plant, you use and hid light (MH) and keep it close as possible without burning the top. You can use HPS also but you will get a little more streching than if with MH.

What are you growing with ? CFL's? MH? HPS?

Just keep the lights as close as possible,and stretch should'nt be a prob,except with Sativas,which are prone to stretch anyway.