It doesn't work with smart meters. They can detect the shutdown of the 1st lamp and startup surge of the 2nd in the split second it takes to flip.
Also, flat energy usage is unusual in itself. Usually there is a little surge in the morning when people have showers and breakfast, set the washing machine. then drops off through the day, and has another surge, in the evening, with little peaks at various points, and drops off again through the night when you are asleep
Unhelpful....Really? Thank you sir, may I have another. The info is right there in the smart meter thread Mr anon neg nozzle.
https://www.icmag.com/ic/showthread.php?t=241499
^- you talking about this? because, there's no proof of anything in there. Perhaps you have forgotten there is a measurement interval involved? so things done in between measurements are invisible?
time - kwh/h
time - kwh/h
^-- these are how it records - rate of power usage over time (seconds, minutes, hours, etc)
so, yeah. it should beat them. current measurement interval is ~5min in socal.
NOW - do you want to BEAT them? because you can. solar installs typically dump to a battery backup array. This array stores the power then dumps it into the house. you might be familiar with the term UPS (uninterruptable power supply.) So, put your grow on a big ass UPS. power UPS from wall. this smooths out the spikes. thus giving you the breathing room needed.
no. its not cheap. the bigger the grow the more the expense.
Yes. its another part that can go wrong/bad.
but in the end, it CAN be done, and rather easily. look at what datacenters use for UPSs to get an idea of what we're suggesting here - the equivalent of dozens of batteries.
http://www.emersonnetworkpower.com/en-US/Products/ACPower/LargeFacilityUPS/Pages/default.aspx