The switches are not designed for LEDs. 600W may work for anything other than LEDs. I tried these switches but they only worked in test mode or manual on/off. Contacted Mfg, told me to send them back. My combined wattage was 288 watts, half of what was advertised. I have purchased and installed other Leviton nfg switches which also work great in the 3 pole version. :)
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