I purchased several of the "ping pong paddle" type led bulbs to replace the bulbs in the overhead lights. When I installed the led bulbs only one side of the fixture would light. Switching the leds, the same result - only one side illuminated. This eliminated the possibility of a faulty led, so I tried a second fixture. Once again, only one side lit. If I remove the non-illuminating led and replace with the original 921 bulb, both sides light (one with led and one with 921). So, the fixtures are good, the bulbs are good, why do I only get one side lit when using the LEDs?
The bulbs in question are similar to these: