Oldblue

No , when you press down on the brake pedal, the lights come on but in parts of the bulb , one side then the end then the other side .
here’s the Amazon information, yes I read it and see use for backup lights , but how are the high brake lights different? Same 12 volts, same bulb number 921.

4-Pack 921 912 T10 T15 White 1200 lumens 12V-24V Extremely Bright Non-Polarity Canbus Error Free AK-4014 45pcs Chipsets LED Bulbs For Backup Reverse Parking Lights Xenon White 6000K

letterman7

Sounds like the solder contacts are melting on the diodes. These are the ones I purchased: We'll see... of course they're "currently unavailable" :-)

Oldblue

They seem better suited for the job , no 4 packs , hmmm.
keep us posted on how they work