I bought a Dorcy 4D cell lantern at a yard sale for a buck and I like how much light it throws and the fact that you can adjust it to light up a room but battery life isnt the best. I was wondering if I bought one of those Nite Ize D and C led upgrades if it would work in my lantern. The bulb looks the same as a standard maglight bulb but I'd dont want to buy it and then have to dig my maglight out of storage cause it'll only work in that.