They SHOULD last for just about forever, but I think a lot of corners are cut on quality to make it more affordable for mainstream stores like Wal-Mart, where the target audience is budget-minded.
I am very tempted to make my own.
Again, the main disadvantages (besides price) seem to be the innate directional nature of LEDs, which are like little laser beams, and that they seem to overheat and prematurely fail in any kind of enclosed fixture.
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