The same is true of the Compact Florescent bulbs. The lifespan is far shorter than advertised on the package. I started writing dates on the base when putting them in and found the lifespan to be half. I have a wind farm on the hills east of my house, It is interesting to watch them all stop when the wind is highest. I've been told that each tower costs about two million but to make money they need to be only one million. The other million is government subsidy.