If it is going to be used against people, it'll have to be in the optical range, and something with good transmission characteristics - ie. not absorbed by air or moisture. Here again, I've got a couple of ideas how I'd defeat that with the application of known tools and techniques. But think I'll just write a memo to my business development guy - on the high side. Although my ideas are fairly obvious, I came up with them is less than a minute. I'm sure we're probably working a proposal or something already.
It’s already been used on the guberment dems for practice and it works fine.