I bought 4 dozen bulbs because I have a lot of track lights that I needed to replace. Half of the light bulbs didn't work when I turned them off. It was extremely frustrating trying bulb after bulb only to find that more than half didn't work. At first I thought my lamp was broken because the newly purchased bulbs didn't light up. I tried the second bulb in the lamp and the third and neither of them worked. I had to do some troubleshooting. I took the non-working lightbulbs and tied them to a fixture that I knew worked. Low, and here are the three bulbs I just tried in the previous fixture that didn't work. I knew the bulbs were bad. I took a bulb from a work light and put it in a fixture that didn't have a bulb and it worked. So I knew the lamps I just bought were bad. I bought 24 bulbs and only 12 of them are good. I ended up paying twice as much for 12 working bulbs. I had to go to the store to buy more because I don't trust the ones that were delivered. The headlights that worked are bright but who knows how long they will last.
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