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I have usually bought Philips bulbs over the years, so did the same again when moving to a new house. Although they're nice and bright, unfortunately these bulbs started emitting an annoying 'buzzing' sound within a few weeks of installing - very disappointing. They were outside the normal 30-day return window, but I sent them back anyway for a refund as they were faulty. Could have just been a bad batch, but I didn't want to get a replacement. Hopefully Philips quality control hasn't started to slip!
Great when they work. Lasted less than 3 years though. Max on for 4hours an evening. Less in the Summer. Used no where near 15,000 hours. Disappointing as Philips are usually on point with their products.