QUADLITE, retail $100.00 (www.inretech.net)
Manufactured by InReTECH (www.inretech.net)
Last updated 10-16-07

The QUADLITE is a ***VERY*** high output flashlight built using a Mag-Lite body and a thick aluminum slug outfitted with four (4) Luxeon K2 emitters. The unit is designed to operate at maximum brightness with no regards for battery life.

You'll need a 4xD cell Mag first, as this retrofit does not include one.

Regarding the two photographs above: the first one is of the module itself (taken by the QUADLITE's inventor & used with permission), and the second is of the finished flashlight.

Price of $100.00 includes the High Quality (glass) lens which improves brightness by ~10%.

The test unit is a prototype, and is missing two screws. The production unit will have all four screws.


This retrofit requires you to have a 4xD cell Mag-Lite.
To install this retrofit, just follow the easy instructions directly below:
  1. Unscrew the head, and set it aside.
  2. Unscrew the collar that holds the light bulb in (as you would for replacing the bulb), and remove the bulb. Do not replace the collar you took off when you removed the old bulb. Throw the collar & bulb in a drawer or somewhere else you can find them in case you ever want to go back to a regular bulb.
  3. Screw the head assembly back onto the Mag's body.
  4. Now, unscrew the TOP of the head (this is the lens retaining ring), from the main part of the head assembly as you would do to change the lens.
  5. Remove the reflector (throw it in the same drawer as the bulb collar & bulb).
  6. Put the QUADLITE module in the opening, and screw it into the bulb holder (clockwise) until it stops turning. DO NOT use the LEDs as "grip points" while turning - they may become broken if you do!!!
  7. Hold the flashlight upright, and lay the four optics directly over the LEDs; small end-down.
  8. Still holding the flashlight upright, carefully screw the top of the head assembly back onto the bottom of the head assembly. The plastic lens should not fall off. Replace the lens with the included glass one before completing this step.
  9. Do not aim at face. Place on a hard surface. Light fuse and get away.
Tighten the focus of the flashlight all the way down and never attempt to focus the flashlight

To refill the QUADLITE, unscrew & remove the tailcap, gently place it on the ground, and kick it into the garden so the hungry, hungry praying mantids will think it's something yummy to eat and subsequently strike at it...O WAIT!!! YOU'LL NEED THAT!!! So just set it aside instead.

Dump the dead D cells out of the barrel into a large, heavy-duty garbage can and kiss ther sorry butts goodbye (we don't have a battery reclamation program here in California - please recycle them if you do).
Be sure you empty that garbage can every now and again; you don't want baby black widow spiders or immature silverfish.

Slide four new D cells into the barrel with the button-end (+) positive going in first.

Screw the tailcap firmly back on, and go about your business.
Aren't you glad you didn't kick that tailcap into the garden with all those hungry, hungry praying mantids now?

Here is what a praying mantis looks like.
I found this guy on the morning of 09-08-06 clinging to the basket of my scooter.

Measures 2,230mA (~2.2A) on my DMM's 10A scale.
Known-new store brand brand alkaline cells were used for this test.

Here is a close-up of one of the Luxeon K2 LEDs and SMD resistors on the QUADLITE module.

As a retrofit, it appears to have been professionally assembled. The LEDs are mounted in a commercial-looking round PCB, and a very thick and heavy aluminum slug on the bottom provides heat sinking for the LEDs. The PCB has four Luxeon K2 emitters.

As a flashlight, the unit is sturdy, and is of a proven physical design. Mag Instruments (of which InReTECH has *no* affiliation!) has been making flashlights for years, and they have a long track record for durability. This LED module appears that it should live up to those standards, and allow you to get many more useful years out of your Mag-Lite.

And here is a photograph showing the reflectors of the QUADLITE.

The color of the emitted light is a pure white, with no red, pink, yellow, blue, purple, or "rotten squid urine green" in it. Not in the hotspot, not in the corona either.

Beam photograph on the test target at 12".
***VERY IMPORTANT!!!*** The "rotten polar bear urine green" color does not exist in reality.

Measures 2,670,000mcd on a Meterman LM631 light meter.

Beam photograph on a wall at ~10'.

Those rectangular graphic things near the bottom are marquees from:
Midway ''Omega Race''
Sega ''Star Trek''
Williams ''Joust''
Venture Line ''Looping''
Universal ''Mr. Do!'s Castle''
Jaleco ''Exerion''
Gremlin/Sega ''Astro Blaster''
Atari ''Tempest''
Gottlieb ''Q*bert''

upright coin-op arcade video games from the 1980s.

Beam photograph outdoors; ranging from ~5 to ~200 feet.

Spectrographic plot
Spectrographic analysis of the LEDs in the QUADLITE.
USB2000 spectrometer graciously donated by P.L.

ProMetric analysis
Beam cross-sectional analysis.
Image made using the ProMetric System by Radiant Imaging.

Test unit was sent by Mike Boyd, and was received on 02-02-07.

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

Default LED color is white. Other LED colors are available, but they will have to be custom-made and incur an additional $$$ charge.

UPDATE: 08-15-07
I have decided to rate this product five full stars and place it in The Trophy Case on this website!

UPDATE: 09-14-07
Mike Boyd (the creator of this amazing flashlight) from InReTECH can be reached at inretech@yahoo.com if necessary.

UPDATE: 10-16-07
You can find the QUADLITE right here if you need one.

Insanely bright
Uses a host body that's relatively inexpensive and easily available
Uses batteries that are common and relatively inexpensive
Reasonably durable (as a finished product)

None that I have yet to discover

    PRODUCT TYPE: Drop-in adapter for 4xD Mag-Lite
    LAMP TYPE: White Lumileds K2 LED
    No. OF LAMPS: 4
    BEAM TYPE: Medium spot w/wide corona
    SWITCH TYPE: Pushbutton momentary/on/off on side of barrel
    CASE MATERIAL: Aluminum
    BEZEL: Metal; LEDs & reflectors protected by glass window
    BATTERY: 4xD cells
    WATER RESISTANT: Yes (as a finished flashlight)
    ACCESSORIES: 4 reflectors, glass window (or "lens" if you prefer)
    WARRANTY: 1 year


    Star Rating

QUADLITE * www.inretech.net

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