Let's be specific OK?
In a flashlight situation, an LED sensitivity is just not an issue. That is unless you manage to load it with very wrong cells. And as those wrong cells would be WAY more expensive, I don't see this as much of a risk.
Damage from a single drop is not much of an issue for either if they are cold. But, put the heat on an incandescent and drop it and we had a new ball game that the old light bulb just lost....
That is, unless it was actually an new (not very available these days) Quartz-Iodine bulb. They have much more substantial envelopes (made of fused quartz) and better internal support to operate a higher temperatures.
Now vibration is yet another thing. An LED may suffer if it carried all over **** and gone on the floor of an MB2 or CJ3 Jeep. But, the only reason the others might not is that the vibration might cause the connections to be buffed clean. This is like that flashlight that you have to turn on and shake.
That is my take on it from years of carrying a flash light that I might have to depend on at any given moment.
Matt
Matt & Mary Colie
A sailor, his bride and their black dogs (one dear dog is waiting for us at the bridge) going to see some dry places that have Geocaches in a coach made the year we married.