Supra,,, would the fans and their controllers not just get the modulated voltage during daylight hours ?? Not sure what it is,,, but lets say it might be 14v pulsing down to 8v and back,,,, but not a complete on/off (although the led emitters will go on/off). I hope someone does some testing on these latest units,,, because they look really good. But,, there is no way I would give up my modulator for them. This LED tech seems to be evolving rapidly. Likely different manufacturers innovating to grab more market share. Likely only a matter of time till a big name in lighting buys up one of them,, and begins to market at name-brand pricing. I would like to get mine before that happens,,,, Cat'