My suspicion is that you have a batch of bad / inferior lamps.
I can not imagine any fault in a lamp that would cause a bulb to blow prematurely apart from a poor connection that causes the bulb to be constantly switched on and off.
Peccavi
August 2010
Take it back to the shop,it could be dangerous,they have to replace it.
anon
August 2010
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix lighting.