I've carried this light on the left every day everywhere for over two years. That's because I lost the one that's covered in mud. I looked everywhere I could think for it looked for weeks for it every time I thought I might know where I put it. But eventually I thought I'd never find it so bought a new one. Well over two years went by when I started doing some concrete work by my shop. Was on the backhoe digging when I see something roll off the side of my bucket. I instantly grabbed my pocket thinking I dropped my new one but nope still in my pocket. I couldn't believe I found it and even more surprised when I turned it on. After all that time buried and being run over in the wet hot and cold it still works. Lifelong customer.