Several reviewers have mentioned a major issue with this socket adapter - bulbs are difficult to screw in and can get stuck or the socket can break. An old electrician's trick that's totally safe and solves the problem: apply a small amount of petroleum jelly to the entire face of each socket, and lightbulbs will screw in and out with ease. Once that problem is fixed, it's a great way to dramatically increase the light in your garage, utility room, storage room, etc. I installed a few of these and they work great.
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