Review on Unbeatable Brightness: White Halogen Equivalent Medium Lumens Product by Kathy Velez

Used two of the four in the pack in about 6 weeks. I use them in a lamp in my office that runs fairly continuously throughout the workday, maybe 6 hours at a time. But they had to last even longer. I had had bad experiences with some other lamps and would only buy branded lamps in the future.