There are 84 lights in our church that use this type of light bulb. We have used Ushio brand lights for the 2 years we have been in the building and they have held up well. But we had the problem that two bulbs burned out 2-3 days after replacement. Replacing the entire body didn't help either. The electrician checked them and they were fine (and in circuit with other lights working properly). The only thing we haven't changed is the brand of the bulb. We tried these Sylvanias and no more problems. I don't know why, maybe they have more powerful lamps than Ushio, but they solved our problem.
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