Yes, the stock bulbs have about a 10 to 1 ratio of wattage between the 2 elements. A lot of bulbs look like the brakes are always on and you can't tell when they actually do come on or blink. Leds just can't go very dim without special PWM circuitry which no one uses in car bulbs. Zevo's are good in this regard because they use 2 different leds. A smaller dim one and a bigger brighter one.
I agree. I probably would have kept the Zevo bulbs if it weren't for the cold spot. The Zevo design works well to not blind the driver behind you, but there still needs to be some rearward-facing light in our corner taillight housings, just not a lot of it. A lot of LED bulbs have a dome lens on top to really project the light. That's something that should be avoided in our cars.
Matching the brightness of the incandescent bulbs on the low circuit is even more important on our cars because those corner lights are right next to the decklid LED panels.
1997 Ford Thunderbird LX