Terrible. I suspected that these lamps would not last as long as advertised, so I wrote the purchase date on the base of my lamp with a marker pen. The lamp I bought at a local hardware store lasted less than a month (11/14 - 12/12). I'll try to contact the manufacturer to see if it's covered under warranty, but not sure if I still have the receipt and/or the original packaging. In any case, I will not buy this light bulb again. UPDATE 05/16/17. The second of these lamps burned out within a few months.
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