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I've been through 9 of these bulbs up to now - for 4 locations! In my experience, the 15000 hours is laughable, as that should equate to maybe 7-years for my typical use. Half of my bulbs have failed within 12-months (around 2000 hours). Maybe it's because my ceiling fittings are mostly enclosed, but LED bulbs generate very little heat so that shouldn't be an issue. But they are pretty cheap, bright and good quality whilst they last.