How detailed is the information the electric company gets from the new smart meters?
They cannot tell the difference especially with some of the new lights using switching power supplies. I don't think 1200w would even register. Most of the lamps like the new LEC draw 600-700 watts for the 1000w equivelent to 1000w mh lights and combinations of MH and HPS lights are used. Grow operations use many of these lights some spaced as close as 4 feet (we just set some green houses for veggies) but got some really good info from a pro canibus grower. So in short your power ussage is small and not really a concern I would worry about.