I bought an 8-pack and have had two of them of them fail so far in under a year with light to moderate use. Very disappointing considering the cost.
It's because of the heat. As has been mentioned, LEDs don't give off much heat BUT the power supply in the lower part of the bulb generates considerable heat. I tried unscrewing a bulb (100 watt equiv) right after turning it off and could not touch the bulb because of the heat. LEDs cannot use AC power directly from the outlet hence the need for a conversion circuit.
They are great
US 120v standard. I have never seen a 220v light. That is reserved for heavy power requirement equipment such as a dryer or AC unit.
Daylight for sure. It renders color as true as could be, and you do need that in some of the dishes.
Sure, as long as you don't exceed the max voltage of the opener. Don't be fooled by the '100w' equivalent. Some products now state that the max rating pertains to 'any' type of bulb, ie. led, halogen, cfl, or incandescent.
Yes, but they don't last. Maybe it's the vibration. Try different bulb.