As when we use the car headlamp,it usually give out a lot of heat and the heat is not very fast.So the use of the headlamp obviously bring the surrounding lights high temperature. Auto led lights  are just near the headlight,but the normal operating temperature of car led lights is only 60 degrees, when the temperature exceeds 60 degrees, LED work is unstable.so if headlamp surrounding temperature exceeds a certain temperature,car led bulbs are easy to bad.So it is a wise choice to choose the good thermal conductivity car lights.