I used an old PC with windows 95 and a script to an apc 8 outlet controller to control some homemade solenoids to power my 220v 1000w ballasts. Worked like a charm after I figured out how to get everything running.
My problem was the 15 amp circuits, so I had to build the solenoids, buying prebuilt was too expensive for me...
Never saw any 20 amp smart outlets.