I hope I can post this web address, its just a site for reviews like Consumers Reports or the like but just for flashlights. I use maglite 3D cell flashlights and have for ten years. I always thought they were the best that I could get. Whoa nelly was I ever wrong, lol. I found this site flashlightreviews.com and discovered that after 1hour on fresh batteries my Maglite is only putting out half the light as when I put the batteries in. So I get bright light for an hour then half output till the batteries are dead 20 hours later. I have to search this site further (just found it 20 min ago) but I will have a decent light in the spring. They have un-biased info on every imaginable type/style of flashlights and bulbs. Read the Q&A section to figure out what everything means.