
I use this bulb in my 4D Cell Maglight for security work. I like the brightness of this bulb as it is MUCH brighter than the stock replacement bulb. The light for this bulb is also a nice color.
Some downsides of this bulb are the 25hr lifespan, and this bulb will run though batteries faster than the stock bulb. Also the instructions (there were NONE) are lacking. I Realize that replacing a light is straight forward, still a note about not toughing this bulb with you bare hands would have been nice. Doing so can shorten the life of the bulb.
All in all i would say this light bulb is a GREAT fit for someone looking for a Brighter than stock light bulb and who is not looking to buy an LED upgrade.