[MargaretR]

I bought one of those 10 year ones in 2002 - it only lasted 5 years too.
Looks like the manufacturers need to be less optimistic in their sales patter.

Now I have one that fits into a light socket above the bulb, so it is mains powered.
I know firemen don't approve of them, but it is near the ceiling and is in a chandelier type fitting which doesn't restrict air circulation around it.