800 lumen FireFly 3-6 D Cell LED Upgrade for Maglite

New product

For 3-6D cell Maglites
3 mode with memory High, Medium Low
Cree XML2 LED Cool White
380 meters range (36,625 CD)

This upgrade converts incandescent Maglites to LED.  Does NOT fit Maglites that are LED from the factory

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$56.00

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The Firefly 800 high powered led bulb is an instant replacement for the incandescent bulb in any D cell maglite including the older style with no "D" in the serial number. This does NOT fit Maglites that came from the factory with an LED such as ML300L.

FIREFLY 800 INSTALLATION
1.  Start by unscrewing and completely removing the head of your Maglite flashlight. (if the head is not completely removed from the body you may have issues with the dropin sitting down in the head correctly).
2. Next remove the bezel and lens from the head and take out the factory reflector.  
3. Insert the 800 lumen Firefly into the head(if you have a very old version of the Maglite you may need remove the extra set of rings that is on the base of the Firefly 800 first so it will sit deeper in the head (the set of rings will just slip off the bottom of the bulb).  
4. Place the lens over the top of the 800 lumen Firefly reflector and screw the bezel back on to the head.  
5. Remove the retaining ring and bulb from the switch tower (if you have the bi-pin bulb you can press down on the tower to eject the plastic bi-pin bulb holder). Reinstall the threaded retaining ring.   
6. Screw the head of the Maglite  back on to the body until it is "snug" .

CHANGING MODES
From the ON position you can "fast click" the switch ON/OFF/ON to get the light to change modes.   Keep repeating this and the light will cycle through High, Medium, and Low modes.  When you get to the brightness mode you want stop clicking.    When the light has been running in any mode for more than 3 seconds it will "memorize" that mode.  When your done using the light and you power it off, the next time it is turned on it will be in the mode you last used.

From the OFF position you can gently press the switch down "half press" just until the light comes on.   If you power it ON/OFF/ON in this manner it will cycle modes from High, Medium, Low.   When you find the mode you want you can fully press and "lock" the switch into place.  When the light has been running in any mode for more than 3 seconds it will "memorize" that mode.  When your done using the light and you power it off, the next time it is turned on it will be in the mode you last used.

Reviews

Grade 
07/01/2020

Perfect Upgrade!

If you have a mag light, this is a must have. It’s easy to install and is very high quality. Other upgrades I’ve tried are gimmicky, not this one! This is something you can set and forget. I’ve been running this mod for almost 2 years and it is still running strong. It is a reliable mod that will make your mag light actually useful! You’ll be glad you made the switch!

    Grade 
    02/24/2020

    800 lumen FireFly 3-6 D Cell LED Upgrade for Mag-lite

    The best i have used so far. Thanks Matt Smith

    • 1 out of 1 people found this review useful.
    Grade 
    05/25/2019

    Great improvement

    A lot brighter than stock and the older led bulbs from 10 years ago. Easy to control.

    • 3 out of 3 people found this review useful.
    Grade 
    05/02/2019

    Happy with my purchase!

    My old 4D Maglite was about to get tossed. Back in the day this thing was awesome. Not only was it a flashlight but also a skull crusher if needed. Flash forward (pun intended) to today where flashlights can light up a ball park and this thing is now barely a night light for my kids room. I decided to search the internet to try and find alternatives before throwing it in the recycle bin and came across this website. I ordered the Firefly 800 lumen upgrade. At first, I thought it was a lot to spend, but all of the flashlights I looked at to replace the Maglite were more money. The install was easy and when I turned it on (BOOM), my Maglite was now cool again. My son said it looked like daytime in his bedroom. Focusing the light stream no longer works but is not needed in my opinion as you get a focused beam in the center and a flood of light on the outside of that beam. As you click through the on/off button, it starts with the highest level beam and then goes to medium and then a low setting. Not sure I am a fan of this as I will mostly use the bright setting. All in all, money well spent.

    • 5 out of 5 people found this review useful.
    Grade 
    04/08/2019

    Great Upgrade!

    The FireFly 800 Lumen Drop In blows away the cheaper LED upgrade emitters. It has 3 very well spaced mode levels with memory. It has great throw with decent spill. A good overall combination beam. I run mine in a 2 D Cell Maglite using the ASF 26650 Body Sleeve Kit, high temp glass lens, Silver Plated Copper Core Switch Tower Spring, & shorty tail cap spring with a bypass wire. With this setup it has great run time on high with no step downs in output. Unlike smaller 18650 flashlights it never gets hot, only warm. A very practical Maglite upgrade! Conclusion: Matt Smith, The Maestro Of Maglites!

    • 5 out of 5 people found this review useful.
    Grade 
    04/26/2018

    If I may add a part 2 review.

    Just to add to my fist comments.There's no impact specs for this dropin but I can say from an unintentional test, I was doing something at my second floor open bedroom window when the light fell out on the roofing above the garage then to the driveway,10' fall,light works perfect still!

    • 4 out of 4 people found this review useful.
    Grade 
    04/26/2018

    FireFly For 3D Mag.

    I bought the FireFly dropin is I guess you could call it LED upgrade for an old 3D Maglite that was an incan light. Big increase in light output, it's rated at 800 lm by ASF and it seems to look like it is, Matt at Adventure Sport says his upgrades are actual lumen rated, I don't have any way to measure output other than comparing lghts. I'm happy with lumen output and good to see 3 levels L-M-H , I do wish it was available with a warmer tint but it's not a very "cool" tint either. It has mode memory which good but the negative for my with this dropin is the on time memory, the light mode must be on a mode for about 4~5 seconds before it stays (memorizes) the mode in use, almost making it a "click to next mode" light which I really do not like, 1 second on time memory would really make this dropin so much better. Matt at AS seems trust worthy and build quality is very good.Nice upgrade,but pls fix memory

    • 3 out of 3 people found this review useful.
    Grade 
    09/30/2017

    Maglite improvement

    Much brighter than oem. I installed it on my pre-D light. I couldn't get it turn on then it would change modes or would turn off. I then got a 5/16 flat washer sanded both sides and the opening put thru the bottom of the bulb. I had a ground issue. Lights up and no problems since.

    • 3 out of 3 people found this review useful.
    Grade 
    07/28/2017

    Finally! Full Size D Mag Drop in Perfection!

    Been collecting lights since 1996 starting off with full size Mags. Fast forward almost 21 years and I have tried near every full size Mag drop in during that time trying to get the most out of the big lights. This FireFly is amazing. The output to my eyes looks to be at or just above the output claim. The beam is STELLAR! It is so clean! Matt has one upped Malkoff with this one. I like it so much I am buying another.

    • 4 out of 4 people found this review useful.

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    800 lumen FireFly 3-6 D Cell LED Upgrade for Maglite

    800 lumen FireFly 3-6 D Cell LED Upgrade for Maglite

    For 3-6D cell Maglites
    3 mode with memory High, Medium Low
    Cree XML2 LED Cool White
    380 meters range (36,625 CD)

    This upgrade converts incandescent Maglites to LED.  Does NOT fit Maglites that are LED from the factory