Just purchased one of these. So far, it is great. Sensitivity is good. Seems to turn on and off within five minutes of sunrise and sunset. Today it is rainy and cloudy and due to the low light it took about 20-30 minutes after sunrise to turn on. Not bad. I also have it temporaly in a north facing window. I am guessing if I move it to a South facing window it would work a little better. I think I am going to get a couple more. For us Northerners, it is quite the convenience to not have to rely on timers. Not much else to say. Will update if there is any issues. Wormsway is a greenhouse website, and by the looks of it might get some more of my money. Lot's of goodies for potentially setting up quite the automated system.
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