Thanks for your answers so far. I live in NE Iowa and the plants that are doing the worst are my rubber tree plant that just dropped its last leaf off, Hawaiian Anthurium which is just hanging on, and an african violet which looks terrible and wilted. We live in a middle townhouse so that eliminates any windows on the east or west sides of the house and being so far north, our north facing windows don't get any light. In fact, it takes weeks longer for the snow to melt on that side of the house than the south side. So that leaves 1 window on the second floor that faces south that gets any sun at all during the day. I just don't know what to do. I have thought about those lights you talked about but for the very reasons you brought up, I hesitate. Any more thoughts you have would be much appreciated! Thanks.