Whoa. Today I put the rope lights under and around the plants-they are incandescents. Tonight I added the cheap mylar blankets that I use (from Amazon ) and sort of tented them, like I usually do. My 6 x 8 GH is 70 degrees tonight while its 53 outside. No heater is running. Even in the center of the room away from the shelves it's 69 degrees. It will go down to 38 tonight so will be interesting to see how this does. The rope lights added a whole new dimension. I think I can rewrap the lights because I probably don't need 4 runs of the rope under each of those long planters. The heater may not even come on.

Awesome!

It's getting harder & harder to find incandescent christmas lights. I was looking for some C9 incandescents and had the hardest time. On line, they want $14-$18 plus shipping for a 25' string. I found some at Lowes for $7, and then at a dollar store for $4. I have yet to find any incandescent rope lights. Would love some for my little greenhouse.

I was lucky we had 6 small sets that join together. We had only used them once. I knew they would be hard to find so I snatched them from our Christmas decoration boxes. I'm going to check Lowes since you had good luck there and get some more while I can.