TB, I run a LPA setup thats controlled by an arduino and some boards I designed and have fabbed and its very cost effective for what it does. I have it running my lights, pumps/solenoids, fans, ph, ppm, temp(x4)/humidity,etc... I am also in the process of creating an HPA setup that will be controlled off the same controller. the little relay boards can run about 15amps(rated 20) and can be wired remote I replaced the switch in the o3 gen with one for example. You can go however far you want with it really, from just cycling a couple solenoids to running a multitable/room EF or DWC.