I bought this product to replace the lamp in my laboratory optical microscope. I bought it in August 2016 and in the last 4 months the bulb has been used for a maximum of 3 hours, but yesterday (January 2017) it burned out. That's a terrible lifespan considering my previous lamp lasted 4 years with the same level of use. I'm not going to be that generic lightbulb anymore and recommend sticking with the brand name if you need one too.
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