This torch use 3 D-cells, and compared to the normal krypton bulb Maglite, it has better output. In the tailcap is a replacement kypton bulb, but you dont need this, only when you want compare with the LED.
I like this torch, i had cheap plastic ones before, and i want a reliable, qood quality light. If you want an indestructable, bright, battery saver torch, and you have money, this is your light. In hungary, who i live, my Maglite has 10 years warranty, and i think, its very good. Sorry for my english, i am hungarian.