If it has a name brand and you can find a website for that name brand with the product listed, it's probably not from "Joe's We find whatever you want to buy in a Shenzheng back alley and slap it in a box" company. And therefore you might have a chance at some kind of support. For Chinese knockoffs, your support in case of problems boils down to "you can buy 5 of these for the cost of one equivalent non-knockoff, so waddaya want?" Given the almost zero problems had by most people with the cheaper lights, and the fact that IMO nobody should ever ride with just one light anyway (MAYBE only one daytime light) that's a reasonable tradeoff.