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Not at all, 35w works well and doesnt make much heat. I'm now on my third generation of these they work so well! Try to find a lamp that slides up inside a plastic flower pot, and try to find a plastic flower pot that has a raised lip or rim that the feeder wires can hang off. Much easier to rehang feeder after filling it and its syrup is rocking around. I've got three outside right now and my hummers are happy!