This is the first year a humm-bird stayed after the cold weather moved in here on the MS Gulf Coast. We've had one little guy remain, so I wanted to figure out how to keep his sugar water from freezing. I tried a couple of those stick-on hand warmers on the bottom of the feeder, but they were lame. Yesterday morning, I got up before dawn and rigged this set-up. It's a 60 watt bulb (not an LED, of course). A short time later, I saw him sitting there on the feeder perch rail getting some early morning dinner, and he stayed for several minutes, so I know he can feel some warmth from the light. It was 22 degrees and continued windy here this morning, and he's still with us. Wish I could take a picture of him at the feeder, but my little cell phone camera is no good from a distance.