Long stem vs short stem, how do I find a balance?

[daddyShark667]

So I have a 29 g reef tank and some of my zoas are growing short and matted and other are reaching and almost shaped downward like an umbrella? Any idea on why? Or do I just leave them be? They’re all growing and multiplying regularly.

 

[Mr. Mojo Rising]

my zoa's stretch like that in the morning, before the tank lights come on, they stretch towards the side of the tank to try to catch some ambient light, but when my tank lights come on, they settle back down.

Your zoa's are saying "please gimme more light, please"

 

[RedFrog211]

They definitely are asking for more light just make the change gradual- don’t want to change too much at once!