So I got a fan controller to run my 440cfm down, now I can get 75F instead of 65 during lights-on. I'm just wondering if underdriving it will kill the motor, I saw some warnings on various things and got a bit concerned. I also found a thermocoupler that would do something similar for microbrewing, it's meant to turn on the refrigeration when it gets over a set temp (adjustable from 50F to 80F). So I could leave the probe, and when it starts getting too hot, have the fan kick on to cool. Which of those would be better for my $$ fan? Considering returning the controller and getting the temp switch, but if the controller is ok I'll just leave that in place. Thanks!