Accidently left my brass Peak Eiger in my shorts pocket when I put them in the washing machine. Hoping I didn't break my light....
I have not washed any of my lights, but my main light is a promethius delta, and is rugged and waterproof. I have accidently washed my sebenza many times, and comes out clean hehe!
I've even washed a LED Lenser P3 which is not waterproof at all. It was in my pants pocket, and I discovered it about two weeks later when I put those on. It worked, though.