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pagegardener - maybe not the LED technology that is not mature but perhaps the company that assembled the bulbs you got? The LED's can be fussy about proper voltage, being kept cool with a heat sink, etc... things that should be designed into the bulbs. I have a 5 watt, 3 volt flashlight LED bulb connected to a low voltage transformer - it's used to light up a small storage room in my basement. It has been on for over three years and hoping will last at least another 10.