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LEDs are diodes, one led bulb has only 1.
5W while T10 halogen bulb has 6-8W, LED bulbs are more energy efficient. 360 degree light angle like halogen bulbs, don't need to worry about blind angle problem.If you want a low cost solution to get you into LED's without a huge investment, then these will do the job, but don't expect to read with them on.
Upgraded with pictures!.
·RELATED QUESTION
Why would a 3-light bar be designed for 60 watt bulbs start blowing 7 watt LED bulbs?
Overheating. LEDs, like other electronic devices, are unhappy at temperatures over 100C and ideally don't run at temperatures over 50C.An old light fitting designed for incandescent bulbs may provide absolutely no path for air to pass through it. There was little point, if it was made of metal and ceramic good for temperatures of 300C, and when the bulb it contained was designed to run even hotter (the filament at well over 2000C).
So upgrade it with LED "bulbs" and they may overheat. You can check for this with a thermometer, or just by touching them after it has been on for an hour or two. They should not be too hot to hold.The other possibility is coincidence, if you are using cheap and crappy LED bulbs, or a faulty batch.
Or, if your electricity utility sent a voltage "spike" down your supply, which blew the bulbs. (Not necessarily their fault, it's simply not possible to completely remove the effects of a lightning strike! )