There are probably more, but I am tired of searching. Reliability has been known to plague many of these lights, and typically none come close to their claimed lumen output.
Get the Surefire if you want a reliable trouble-free product, thats backed by the best warranty in the business. IMHO the DX lights can be a worthy investment... but only to those knowledgeable enough to troubleshoot their way out of problems.
You made 2 posts, both promoting this product. You are either a dealer or an agent for the company. Shill posts/threads are prohibited, and your account here is terminated.