Folks, if you've recently upgraded or renewed your annual club membership but it's still not active, please reach out to the BOD or a moderator. The PayPal system has a slight bug which it doesn't allow it to activate the account on it's own.
If they are "controllable," I'll have to let those folks who have done it with controls to answer that one.
I have non-controllable LEDs.......and I also need to tell you I'm overly anal....so I build a Rube Goldberg where I started the lights all the way up at the ceiling. Every week I'd drop the lights a couple inches....you can see the marks on the far end of the "sticks," until I got down to the height of the canopy that would eventually would be put on the tank.
I started my ReefBreeders light off at 30% blue and 20% white and went up every so often. I max out at 80% right now but I'll probably even go to 100% eventually.