|
I ran 40psi and more in my off road only Jeep and only the tiny number plate bulbs went - it's been airborne a few time too.
It's all LED now though.
Bulb holders usually have a fair amount of springiness to them, so they don't transfer shocks directly to the globes.
You could maybe try rotating the globes 90 degree so the filament is in their stronger plane?
|