Mine have been fine so far. If the voltage goes down (and it went way down - don't ask me why!), they just dim a bit. I think the new LED bulbs are very different than the older generation ones. They are very reliable today, not to mention the amazing variety of configurations they come in now. I'm even using LED strips, which you can cut to length and make your own 'bulbs' with (such as by lining an inverted plastic cup).