texasluv said:The heavy duty Intermatic rotary timers (which is probably what most people use) are rated for 1800W. That being said, with only a 434W T5 unit plugged into a fairly new one I get a spark each time it switches on.
They are notorious for starting fires, melting plugs, and being generally unsafe. It is far more likely with a 1000W light than anything else. I've never really had a problem with 600W or lower units melting the timers or cords, but they do spark.
Inline timers are the best to use on 1000W ballasts that are running on 110v. Switch over to 220V and those timer problems are a thing of the past- every 220v timer I've seen is super heavy duty.
Use a contactor