Answer my own question from the press release: "they last 50,000 hours before needing to be replaced." Under normal use (say, 8 hours/day), the LED should last 15 years or more.
By comparison, an incandescent bulb has a lifetime of 750–1000 hours. (Though for some reason, the overhead lights in my house burn out much faster....)
Factor in electricity savings, and a few strategically-placed LEDs could be a long-term savings. I can't see replacing every bulb in my house, though.
Factor in what it costs to change light bulbs in some stairwells and emergency lighting units....and you don’t mind paying a lot for bulbs if they last for years and draw little juice.
Here in Nashville, Tn., we routinely receive 126Volts on our commercial lines.
Bulbs burn brighter but last for shorter periods.