I have five 75W 120V AC LED lamps on a dimmer switch. They draw 13 watts each (375W total). I also have a 600W Lutron dimmer switch hooked up but the thing buzzes when the lights are dimmed. I also tried a Leviton dimmer with the same results. I've heard about debuzzing coils but seems to be that many folks have mixed results with them.
I'm wondering if I can just wire each of the 5 bulbs to a relay of some sort and then use a raspberry PI to control the relay (the PI is already wired into my home LAN so I can put an app on my smartphone to control the relay). This way, I can turn only one lamp on for dim lighting and all 5 for full brightness. No, it's not true dimming but at least it won't be buzzing.. I hope.
What kind of relay should I use? Looking on Ebay for a 120V AC 8 channel relay I found this but not sure if this beast will work. I just want to use the GPIO pins on the PI to trip the relay so it seems pretty straightforward. The listing says the relay is good for 2A per channel and if I did the math right, that should be well within the 13W per bulb (13W / 120V = .1A)
Anyone have some thoughts as to what the best method would be to implement here? Should I go with a Triac relay instead (not sure what that is but will look into it if that's a better way to go).