I am using a 2 digital block heater timers from Canadian Tire. They seemed to be the most heavy duty, and they had a grounding probe. However they only have one on / off setting per day, which works well for my MH lights, but I have a NO actinic that really dosent add much when the MH are fired up, so it would be nice to be able to shut it off for the hours which my MH's are on to save on bulb life and a small amount of heat. Another problem with them is that they reset after a power outage. Which is fine if you are around to notice but if I were to be gone for a few days it would suck to have a small power outage knock out my lights for a long time!
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