I see that there are some retro-fitting LED devices for older flashlights to extend battery life. Anyone here fitting those for use? I have 2 x 6VDC old camp lights that I'd like to smarten up. Then they won't make such a ridiculous pool of wasted light. If the new campers must get their video fix, I don't really care what they're missing. Just as long as I don't have to hear it. They will nevr notice the bear, snuffling along the edge of their tent.