I have found in the pinball world, there are cheap LEDs and more expensive LEDs. EVERYONE says stay away from the cheap stuff. (99.99999999999 % of the time will say China if it is cheap). The good ones, still might say China on them, but there are good factories and bad ones, but if you can find a manufacture that is not in China, buy them.
On the other half of this, I had my tail light out and the silver that surrounds the bulbs was in poor condition. What I did was bought some chrome tape for vent tubes for HVAC. It is like sticky aluminum foil, and stuck it and formed it to the tail light, installed regular bulbs, and now it is bright and looks correct.
I like the use of LEDs when possible, but finding quality bulbs.....?