Love the pic! he's super cute... and actually looks a lot like my youngest nephew. :) Doesn't Buzz wear a helmet w/ a clear faceshield? maybe that's why he wouldn't wear the hat that came with the costume. lol!

Not without investigating it. Hate to tell you I don't know of any AC contractors that are fortune tellers with crystal balls. I can't tell you how many times a year I get someone who calls me wanting me to diagnose a system over the phone. LOL. If you want a guess go buy a magic 8 ball. I'm not in the guessing game business. If you want a quiet unit I can install one that is so quiet you won't even hear it run until it engages Stage 2 and even then it's quieter than what you have now. But I know you don't want to hear that do you? Realize I said it would be me installing it. So if you don't live with in my service area you are left to your own resources. This is the truth, much of which no one wants these days. Run to the nearest gimmick provider for safety.

wow

Are the lights on a dimmer? It might be producing lots of powerline "hash" -- that is, radiating noise of various frequencies well into the radio frequency range back into the powerline. Presumably your cooktop is unusually sensitive to such noise. Another possibility is that the power supplies in the lights themselves are the source of the noise. Or, it could be the combination of this particular dimmer and these particular lights. If you have the lights on a dimmer, I would first try replacing the dimmer with a conventional snap switch, and see if the noise abates or disappears. If it does, try changing to a different brand or type of dimmer. If they're not on a dimmer, I'd try disconnecting all the lights from power, then adding them back in one by one, to see if any single light is the source. Line powered LED lights have switching power supplies built in, to convert 120vac (or 240vac in other countries) to the lower voltage that LEDs need. It's possible that one of your light units has defective noise filtering in its power supply. If they all make noise, it would be pretty surprising, because the page you linked to seems to say that they meet regulatory requirements. I'm not familiar with Canada's, though, so I don't know how complete their compliance is. If the easy fixes above don't work, you may be stuck with either replacing all the lights, or changing the cooktop. One possible "quick fix" before going that drastic route might be to install a noise filter. I would wire it in ahead of the lights, maybe in a cellar junction box. I've never had to do this, so I don't have a specific recommendation. However, a quick web search turned up this one, which is supposed to be wired in ahead of noisy devices when they're interfering with an X10 home automation system. Others here may have their own recommendations for noise filters. Please let us know how it goes.