how do you destory an object with light??

hey guys, im makinga fps i have a flash light that turns on and off but i need help with something, i want to make a object die aka destory when its hit by the flashlights rays, aka the beam, so i turn it on its aimed at the object and it destorys…ive tried using on collision with tag but it doesnt work…

I don’t think you can destroy an object with a light. But I don’t think you need to anyway… Try ray casting!

http://forum.unity3d.com/threads/165305-SpotLight?p=1130007&viewfull=1#post1130007