LED Shop Light Flashing

I had problems with the florescent fixtures not coming on in cold weather. That's why I "upgraded". Naturally with my luck, it probably wasn't an upgrade.
Yeah, same here. The fluorescents were kinda dicey in the winter, even with electronic ballasts. Mine had 8' tubes, which were getting kind of tough to come by around here; so I started switching them out to LEDs. With 6 two bulb fixtures in the shop and 2 more in the garage, I'm still replacing 2-3 bulbs a year.