I got this bulb at the Walmart for $5 and I put it in a ceiling lamp and upon turning it on I was greeted with a loud pop and big spark, and a tripped breaker. It looks very poorly made inside also (Made in China). So don't buy cheap Compact Flourescent Bulbs
Let me put this as diplomatically as I can... I am extremely familiar with the conditions and practices within virtually every plant - be it American or Chinese or whatever- that makes compact fluorescents for the mass market. I include the "big box store" brand in this comment. These manufacturers are, without a doubt, slipshod, disorganised, cespits of third-world conditions and technology. Not one of them is even close of being ISO 9000 ready. Their records are spotty, and production controls barely adequate.
Quite simply, it is unfair to expect "rocket science" from those whose development of rockets stopped in the fourth century.
Do they still produce anything in Electronics or energy saving equipment outside of China? I can't recall the last time I saw a product of this type with a good ole "made in the USA" label. I ran across some bug lights in that arena recently for 50 cents or a $1 each in a local grocery bargain bin. I picked up several although I haven't test fired any of them yet. Flash, snap, pop .... blowing the circuit has to be energy conservation too, doesn't it?
Here's a cut/paste from one of my posts elsewhere on this board:
I've had a statistically significant number of premature CFL failures in my five-socket dining room fixture- I wonder if it's substandard quality control or if they don't like being operated BO (Base Oblique)... I do insert them metal-side first so improper installation can probably be ruled out.
I thoroughly enjoy the extra lumens per watt that the CFLs provide, however, I'm beginning to think the long-life claims of these bulbs only apply if they're left in the package!!!!!
No wire bias here- I'm standing on neutral ground.