Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Poor quality control

Never could get this to work properly, right out of the box. I was using a heating bulb in it, and it just wouldn't make a good contact when screwed all the way in the recepticle. I would have to wiggle it to get it to flicker on, and as soon as I set it down, it would go off. Very frustrating. Was the same for every bulb I tried in it. Sent it back for a refund.