Gradually Dimming/Ramping up lights

hey guys, i been thinking a lot about how when my lights go out and the temp drops dramatically, humidity rises and vpd falls to almost zero.naturally the sun is weaker in the morning and strong at noon and gradually gets weaker as the sun goes down. Does anyone know of a controller, or somekind of program that can be hooked into my 4000w hps light bank that will ramp up gradually until noon and then gradually taper off? It runs on 220v and theyre all digital dimmable ballasts.

I know the Solarsystem series can do this. Haven’t heard of a stand alone controller that can do that though.

Unless your ballast manufacturer offers something for that then no. Gavita has something I think, not sure about the others. I know nanolux has some sorta remote control, probably do that.