There are no benefits, it is mostly for the person watching. I have these on my lights, too. I use the cloud effects sometimes, but, not too often, same with the storm effects. There fun for me, but, the fish hardly notice them at all. I have the orbit IC LED and I used them at first, just for s***s and giggles, but, rarely use them anymore. I do put them on every now and then, though. Kind of neat, but, worthless, as far as the fish and plants go. They don't care....
I pretty much have every light that Current-USA makes (actually, I have them all except the old version of the Orbit) and they are nice and easy to program, but, ultimately, the storm effects are for the user and not the fish and plants inside the tank. Mine just don't seem to care at all. I have had Current as long as I have had fish and plants and at no point in my long career in the fish hobby have I ever seen the fish even notice that the lights are blinking or dimming. That isn't to say that all fish won't be affected by them, I just have never seen them care about it. The cloud cover maybe different. The newest Orbit does random cloud cover. It will slowly dim the LEDS across the whole light on a percentage basis. If you put %50 on, it will do this effect %50 of the time that the sunlight is on. It would make for some interesting experiments, imo. I have done a lot of experiments on lighting in the last few years, just not with the cloud cover, unfortunately for this thread. Sorry...
I just read the post about the breeding thing. I notice that my cories breed after a real thunderstorm, I believe they notice the change in air or water pressure, maybe? They act all crazy when the storm is starting and then mate afterwards. Unfortunately, I have a LOT of fish and the eggs get eaten. I have tried the thunderstorm effect with the lights to see if that would trigger it, and the answer, as far as my fish are concerned, is no, it doesn't seem to trigger breeding in my cories. They seem to notice some kind of change, what that change is? I don't know... They do dart to the surface more when the storm starts and when it is developing, they seem to act crazy when it hits, darting to the surface and then back down WAY more than they usually do! They must notice a change in the air they are gulping? Maybe someone can confirm this for me?