I bought 20 bulbs from Amazon or Ebay - I gave sista 10 bulbs - I'm sitting here in the computer room and the bulb blew about 8 o'clock. Never gave it a thought so I told myself I would replace it tomorrow.
Sista is just after phoning me and said that one of the bulbs also blew up in her kitchen as in lamp. But the bulb blew all the electric appliances.
Fortunately her neighbour came down and flicked on the trip switch.
I never said to her about my bulb also blowing. I told her to throw them all out.
How can bulbs be faulty. She wanted me to send them back but too much hassle.
I've been lucky in that my electric didn't go off - it was some bang.
I think there has to be something wrong with the bulbs if two from the same lot malfunction after being used for a short period of time in two different households.