The Dorcy L.E.D. Twin Globe Lantern in my opinion is a great lantern to keep for emergencies. For one, it uses LEDs in a variety of different brightness settings and also it is waterproof. Yes...it really is waterproof.
I love LEDs. They are not always the brightest, but they are bright enough and they last a long time. This lantern in its 160 lumen setting (two LEDs on) boasts up to 175 hours of runtime. That is over a week of being on with one set of 4 D-cell batteries. That is excellent for a lantern. Lets hope you don't need it longer that that. If you do, you can keep it on the one LED setting and should get up to 350 hours (two weeks). Optionally, its night light setting would get you up to 600 hours.
WaterproofYes it is waterproof. I simulated a torrential downpour and a flash flood to find out if this was really waterproof. I simply turned on the lantern, put it in the shower full blast, and closed the drain until the lantern began to float. The shower rained on the lantern for a good 30 minutes and then it was left to float for about 4 hours. There was no signs that it effected the lantern in any way. no dimming, no water on the inside, nothing. It just kept on working. The fact that it floats even with the 4 heavy D-cell batteries inside can come in very handy should you have a flooded basement, or if your boat capsizes or something like that. You won't have any problem finding it. It will be floating right on top of everything.
Dual LEDWith the switch set for both LEDs, you should get 160 lumens for about 175 hours. I kept this on for quite a while and it never did dim. I am confident that it will last a long time. The lens around the LEDs is designed to shine 360 degrees of light. I found it to be of reasonable brightness as well.
Single LEDWhile I didn't see a specific rating listed for just one LED turned on, I found it to be nice and bright as well. I would probably just keep it on one LED most of the time to conserve battery life unless I was reading or something. of course I would have some extra batteries as well.
Night LightThe night light is an amber colored LED and had a couple of ratings listed of about 600 hours (what it said on the box), and 700 hours (on a couple of web sites). When you are talking about that long on time, I don't think it makes that much difference. This is a ridiculously long time to test (over a month of on time) so I will just take their word for it. An LED by nature is reliable and long lasting so I will just have to assume that it will keep burning for quite some time even if it falls short of the 600 hours. If you do have to count on a specific length of time for some reason, I would gamble on the 600 hours but keep extra batteries just to be safe.
Other FeaturesThe base is very heavy because of the batteries mostly. This is nice to keep the LED portion somewhat upright when in water. It is also nice so it doesnt blow away. There is also a plastic hook built into the top so you can either hang the lantern by the handle or by the built in hanger.
This lantern is a great lantern for camping or for emergencies. There are several advantages of it being LED as well. It won't get hot, and it will last a very long time on your batteries. I don't recommend keeping batteries in this lantern if you don't plan on using it for a while. Leaving batteries in lanterns and things in this way is not a good practice anyway.
Overall, I consider this to be an excellent lantern. Keeping extra batteries for the lantern will keep this lantern lit for a very long time.
If you want more information on the Dorcy 41-3108 160 Lumens 4D LED Twin Globe Lantern, check out this link.