
Update: Jacky LED refunded my purchase price and promised to contact the manufacturer to improve this product. I trust them as they have always provided me with great products and services in my previous dealings with them. I had my doubts if it would work or not. It's not a reliable design, rather flimsy compared to the original designs of the time. The frame is not made of metal, but completely made of plastic. It has a piece of copper colored metal that makes contact with a very small area of the thread base. I wouldn't feel comfortable using them with incandescent bulbs, but the LED bulbs I use draw some power and generate a lot less heat. They didn't work out of the box. I had to grab the center contact and pull it out so that it made contact with the bulb's center contact terminal. (THIS SETTING MUST BE DONE WHEN THE UNIT IS NOT CONNECTED TO THE MAINS)

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