Last year it was just me and my gf in the house, this month it's me, the gf, my renters( 2 adults) in the appartment on same meter and I got a buddy, his wife and there 3 year old in the house. So I got 7 people on the property at any given time. Rarely is no one home somewhere, and last month the bill was 328, a year ago, just me and the gf, it was 350....... I think the $500 led light investment was well worth it even with the initial big investment. J.Wal