They aren't that great for illuminating anything but small close in areas in my experience. I was 'trialling' one on the bridge on loan from the Flight Commander on my last ship. The finger torch is used when they are flying at night, oddly enough. But its dark, really dark. Ok for me on the bridge because at night the bridge was kept dark with even minimal red lights in use. However its a finger torch, kept low over his notes and solely for that purpose. Trying to use it to illuminate anything else was a waste of time. I gave it back instead of liberating it despite it's 'shiny' credentials.