The bulbs I'm using obviously don't screw in deep enough to make contact with the center pin so I had to use tweezers to tighten the center pin 2-3mm . With this setting they work perfectly. The side contact metal is a bit small, which makes me wonder if a higher wattage bulb would cause heat issues. But I never tried it because now I only use LED bulbs. Each adapter comes with a plastic cap. While this is nice, it creates unnecessary garbage. If I need to buy more, I'm willing to pay up to 50% more for better quality adapters.
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