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Originally Posted by skyguy79
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Has anyone else ever seen a lamplight behave like this at any time? It's the first time I've ever seen it happen anywhere.
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My guess is that your lamp post light is controlled by a light-sensitive switch. When it gets dark, the light goes on. With the decoration over the light, there is enough light from the bulbs reflecting onto the switch to make it turn off. After about 30 seconds of dark, the switch turns on again. After about 30 seconds of light, the switch turns off again. And so on.