maglite have be around for a long time now . at first the big powerful flashlight be consider cut edge technology . they high quality focus lens , computer machine aluminum housing with rubber gasket and xenon light bulb be all still the best quality one can buy . however they look a little old fashion next to the super bright , super efficient led flashlight . but the Maglite have two big advantage over ANY other light on the market . for $ 20 instead of $ 120 you have a light that while bigger and heavier be just as bright as any small led light and it will last 25 year -lrb- my last one do -rrb- . plus , if this be for security work or checking on bump in the night , 10 lb of metal 2 1\/2 foot long feel a lot better in you hand than 6 inch of plastic . do not waste you money on the LED bulb . I buy one of the best and most expensive upgrade and really see no difference . if you want a really good flashlight that will last a long time and always work I know of nothing that even come close to the Maglite . one other thing , yes the 6-d battery be MUCH brighter than the 2 or 4 d battery size . other than the money I waste on the LED bulb upgrade this be the best $ 20 I have ever spend .