Yeah, when you look at the page, to the right under the price there's a box to check to add a warranty. It will be through Asurion or All State usually I think. You buy it on the same order and register on the insurance website, easy peasy. If it breaks you make a claim and they either fix it (unlikely) refund you, or send you a new one.
I did the same when I bought a Kessil a500x because I see people fussing about their Kessil lights dying a now and then. I think it's from lack of taking care of them and running them too close to the water personally, but I figured for 80$ I would just get the peace of mind for 4 years.