Any light where the manufacturer isn’t claiming tough and durable… ?? It’s just like I wouldn’t expect a flashlight that isn’t rated to be waterproof to actually be waterproof. It might, and great if it is, but I don’t expect it to be waterproof unless specified by the manufacturer.
I have dropped a few lights on hard surfaces. I’ve had one stop working and my reaction was that it was my fault, the others I considered myself lucky. I don’t remember exactly what lights they where, but certainly not one of those tough and durable things, I don’t have any such lights. Somehow I just feel responsible for my own actions. If I drop it and it breaks, I broke it…
I wouldn’t make a purchase decision on drop tests, maybe because I don’t use single lights for survival purposes. When ever my survival depends on light I bring multiple lights with me.