While investigating the TerraLux Diode Retrofit Kit for the 2AA Mini Maglite, I discovered a similar (and less expensive) kit made byRAM Instrument. The concept is the same. The RAM kit consists of a replacement reflector cup and a diode cluster connected to a circuit board.
The user simply removes the Mini Maglite’s lightbulb and reflector and replaces them with the RAM components. The resulting Maglite produces "colder," more diffuse light that appears blue (as opposed to yellow) on camera.
Unlike the TerraLux kit, the RAM kit (once installed on the Maglite) is not focusable from spot to flood. The beam remains fixed. I was unable to find exact numbers for the illumination output, but to the naked eye the RAM LEDs are more powerful than the standard incandescent bulb. The incandescent Maglite can be focused to a tighter, brighter spot and has a longer throw.
Another advantage of the RAM kit is the extended life of the LEDs compared to the incandescent bulbs that come standard with the Maglite. The LED kit uses batteries at a reduced rate, too, though I’m unsure of exactly how great is the difference.
If you want an LED Maglite and don’t want to pay for the brighter TerraLux, the RAM conversion is a budget option.