Having only owned these bulbs for two weeks I cannot honestly attest to their effectiveness or longevity. What I can say is that these bulbs are significantly better than previous equivalent wattage LEDs purchased at a local major department store. I used to think that the brightness of light means white, which tends to wash out some colors and blind others. And I was wrong. These bulbs provide a warm, bright light that brings out the true colors in a room, makes knitting, reading and watching TV easier and reduces eye strain. It's definitely worth it!
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