LunaLEDs 1W Power LED Bulb, retail $24.99 (
Manufactured by Avant Technologies (
Last updated 03-27-06

The LunaLEDs 1W Power LED Bulb is designed to fit a 2 cell C or D Mag-Lite, but since I do not have one at my disposal, I installed it in a BuiltWell 2xD Flashlight instead.

This flashlight has a fixed focus, not adjustable like the Mag-Lite has; it is fixed at an unusually wide viewing (beam) angle. So I cannot furnish beam photographs showing how it would perform in an adjustable focus flashlight, and the intensity value will appear lower than expected.

The LunaLEDs bulb has a boost (step-up) driver circuit concealed n its base, ensuring the Cree 1 watt white LED in it receives the expected Vf and If that cannot normally be furnished by the 2.4 volts to 3.0 volts provided by two cells.

It is designed to function properly whether you use disposable (alkaline) or recgargeable (NiMH) cells in your flashlight.


Unscrew and remove the aluminum lens ring on your Mag-Lite, throw it in the {vulgar term for poo-poo}bowl, yank that silver handle on the front of the cistern down, and flush it away...O WAIT, YOU'LL NEED THAT!!! So just set it aside instead.
Remove the reflector, and put it somewhere face-down where it will not fall to the floor and get stepped on. *CrUnCh!!!* there it goes...oops!!!!!!

Unscrew and remove the metal collar around the bulb, and set it aside...O crap there it goes...rolled right off the desk...JUST KIDDING!!! Remove the old bulb, and STOMP ON IT!!! LOVE TO HEAR THOSE THINGS POP!!! Or just put it in a drawer or something if you're adverse to breaking things.

Place the LunaLEDs bulb into the Mag-Lite's receptacle, and then screw on that collar you took off a moment ago. Place the reflector back in, place the bezel back on your Mag-Lite, and screw it down until it stops. There, done with that. :-)
Aren't you glad you didn't flush away that lens ring, step on that reflector, and flick away that little metal collar now?

To turn the light on, press the rubberised button on the barrel until it clicks, then release it. To turn the light back off, press and release the button the same way again.

For momentary (signalling) mode, press the button more lightly - before it clicks - and hold it that way for as long as you need light. Release the button to turn the light back off.

The beam can be adjusted from a tight spot to a wide flood by turning the head one way or the other.

Change the batteries like you would any 2-C or 2-D Mag.
Unscrew and remove the tailcap, and relieve the flashlight of its expired batteries. Dispose of, recycle, or recharge them as you see fit.

Insert two new or freshly-charged batteries, button-end (+) positive first into the flashlight barrel. Screw the tailcap back on, and be done with it.

This bulb is designed specifically to be installed in 2 cell Mag-Lites, using C or D cells. Installation in a Mag with 3 or more cells will probably blow it up.

The Mag-Lite is a reasonably durable instrument in and of itself. One of the most common failure modes - the incandescent light bulb blowing out or developing this useless, ring-shaped beam when the flashlight is dropped - is eliminated when you replace the bulb with a LunaLEDs bulb.

The boost/driver circuit inside the LunaLEDs should have some form of regulation; meaning that the light output won't begin to decrease as soon as you turn the flashlight on, as can happen with unregulated LED retrofit bulbs.
According to the LunaLEDs .PDF file, the LunaLEDs is driven by AVANT TECHNOLOGIES light engine which ensures constant current output in maintaining stable light output.

The light emitted by the LunaLEDs blub is a pure white, with no red, pink, yellow, blue, purple, or "rotten octopus urine green" tint to it.

The LunaLEDs bulb's LED has a lambertian dome over it. If the LunaLEDs bulb were used without a reflector, it will have a viewing angle of 120.

Although this bulb is intended for use in a Mag-Lite brand flashlight, it may be used in any other two C or D cell flashlight that uses a PR-base lamp. Yes, it specifically says so in the .PDF file linked on this web page.

Beam photograph on the test target at 12".
Used in an BuiltWell Medium 2xD Flashlight.
Measures 127,100mcd on a Meterman LM631 light meter.

Beam photograph on the test target at 12".
Used in an Energizer Find Me Flashlight.
Measures 86,300mcd on a Meterman LM631 light meter.

Remember, these intensity values are
because the LunaLEDs bulb was used in flashlights other than a Mag-Lite.

Spectrographic plot
Spectrometer plot of the LED in this bulb .
Ocean Optics USB2000 Spectrometer on loan from TWO-CUBED.

Beam photo at ~15'.

Those rectangular graphic things near the center are marquees from:
Cinematronics ''Star Castle''
Gremlin/Sega ''Astro Blaster''
Venture Line ''Looping''
Sega ''Hang-On''
Williams ''Stargate''
Sega ''Star Trek''
Nintendo ''R-Type''
upright coin-op arcade video games from the early-1980s.

And that red thing is from an American DJ Laser Widow.

Sample was sent by LunaLEDs and was received on 03-24-06.

Product was made in Hong Kong. A product's country of origin really does matter to some people, which is why I published it on this web page.

UPDATE: 00-00-00



    MANUFACTURER: Avant Technologies
    PRODUCT TYPE: Replacement PR-base "bulb" for 2-cell flashlights
    LAMP TYPE: 1 watt Cree white LED
    No. OF LAMPS: 1
    BEAM TYPE: Variable focus, when installed in a Mag-Lite
    CASE MATERIAL: Metal bulb base, plastic LED dome
    BEZEL: N/A
    BATTERY: 2 C or D cells, alkaline or NiMH
    CURRENT CONSUMPTION: Unknown/unable to measure
    WARRANTY: Unknown/not stated


    Star Rating

LunaLEDs 1W Power LED Bulb *

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