One of the most common causes of early lamp failure is poor contact between the lamp base and the socket. This can produce enough heat to melt the solder at the base of the lamp and allow air to enter the lamb. Once air is in the lamp it will fail almost instantly. This problem can be caused by not screwing the lamp in tightly or poor quality sockets. What do the burnt out lamps look like? Most of the time if air has entered the lamp you will see some yellow stuff inside the glass.
Don(resqcapt19)
