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Thread: MagLite 2C/2D 4D 3W LED drop-in Technical Review

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    Default MagLite 2C/2D 4D 3W LED drop-in Technical Review

    Okay, so what makes this sucker tick, and how does it actually perform?


    First, the drive waveform on the pins of the LED, from the switcher that is built in:




    I mounted the drop-in module into a 2D-Cell light, so that cell voltage drop would have much less of an effect on measurements.

    Next we have preparation of the MagLite 2C LED module, where I have drilled into the side of the Luxeon, to access the Luxeon slug, backfilled with thermal grease for temperature measurements:



    Showing the K-type thermocouple wires stuck into the hole, notice how fine of a guage they are:



    Here is a picture of part of the setup after the 30 minute test was over:



    The interesting thing here is to note just how hot the LED slug gets, and how it's light output drops as it heats up. We are looking at nearly a 60% drop in output, due to the LED getting hot, from a severe lack of good heatsinking:




    At the beginning, I measured an input voltage of 3.109 V from the batteries, pulling 1,320 mA. This works out to 4.10388 Watts input. I did not have time to modify the output so that I could measure current to the Luxeon.

    At time zero, I got 3.986 V across the pins on the LED in the module. This is the voltage applied to the LED.

    The voltage to the LED rapidly drops, stabilizing over time, as the module heats way up.

    Towards the end of the 30 minute runtime, the current dropped to 410mA at 2.95V on the input side, with only 3.115V on the Luxeon pins, after the MagLite drop-in heated up to 72.7 degrees C (162.9 F) on the LED slug.

    As the module heats up, it looks like the circuitry severely kicks back the power to the LED, resulting in a major drop in output.

    It would be interesting to see how it would perform with better heatsinking.


    If I have time, I will do a better set of measurements, monitoring additional parameters.


    --------------------------------------------------------------------------


    Okay, well I froze the light body (without the batteries). I installed the room temperature D cells into the flashlight. Then I used M.G. Chemicals Super Cold 134 Plus (which can cool to -51C) Catalog #403A-285g to freeze the head section, to include the pillar/post and LED assembly. As soon as the LED slug rose to -40C, I started the test.

    You will note a few quirks in the MagLite 2C LED 3W module as it is warming up.

    FYI, the ambient temperature, in the room where I ran this test this morning is unheated, was 7.8 C (46F). It was about 10C cooler in the room than the test I ran yesterday.

    If the ambient is warmer than 7.8C (46 F), then the LED would heat up more, and the light output would drop even further. It would also drop sooner.




    --------------------------------------------------------------------------


    Okay, I hit another Walmart and scored some stuff:








    As it turns out, I opened this Maglite 2D 3W LED, really hoping to see some innovative heatsinking, and all I found was just a standard Maglite with the LED module in it:



    One of the funniest things I found, is they still include the incandescent spare in the base of the MagLite LED 2D 3W.

    Yes, it dims just like the LED module does when placed in a regular MagLite.


    --------------------------------------------------------------------------


    Quote Originally Posted by wwglen
    Even dimmed it will probably be bright enough for extended run times.

    Question:

    Does the battery current drop as the protection kicks in?

    Thanks.

    wwglen

    Yes, the current drops *alot* from cold to hot (72.7C or 161 F), in a cold ambient (I've been running in 45-55F ambient). Even the 10C difference makes a surprisingly big impact. I would expect these MagLite LED modules and MagLite LED flashlights to not perform as well in a warmer area of the country. When the module is hot, soaking them with alot of with cold spray causes the light output to jump back to when you first turned it on, and the current goes right back up at the same time.

    In case anyone needs the SKU's to look around Walmarts in their area:



    --------------------------------------------------------------------------


    From the packaging of the Maglite 3W LED Upgrade, for those who want to know:






    --------------------------------------------------------------------------


    Here is the MagLite 4D 3W LED module, you can see the switcher running (ripple), at about 200KHz:




    The ones that "buck" are not just resistored like some have said.


    --------------------------------------------------------------------------


    I've just got a waveform off the MagLite 3D LED 3W module. Notice I had to crank up the vertical scale to see the switcher ripple, so instead of being 500mV per division, it is at 10mV per division, so it has roughly 30mV of ripple (much less than the others), and it is switching around 333KHz:




    --------------------------------------------------------------------------


    I know everyone likes a beamshot layout.

    I'm currently working on them, here is the first teaser:




    --------------------------------------------------------------------------


    Added a few lights to the array. Beamshots are after about 25 minutes runtime here. The LED MagLites were alot brighter at the beginning. All lights have new cells, and cost quite a handsome sum to go fresh. Note the Fenix L2P shown here is quite the cream of the crop...






    --------------------------------------------------------------------------


    Here we go, one of those for your eyes only, which reveals
    the secrets and the shortcommings, and explains a great
    many things...








    Potting this puppy might help alot...but keep the potting out of the contacts.

    I really cannot believe MagLite actually did this...


    --------------------------------------------------------------------------


    I have not had a chance to characterize the module yet, but I will try and get some curves on it over the next few days. I can tell you it still works at 1.45V in, but it will only pull 182mA out of the cell. As such, this is well below the 0.8V of 2 depleted D sized Alkaline cells in series.


    --------------------------------------------------------------------------


    Quote Originally Posted by martytoo
    Newbie,

    Why do you have two beam shots for Mag 2D LED Bulb (to the right of the Inova beam) ??

    And, isn't it true that even though the measured beam is 50% of maximum when hot, this is just about the limit of what we can discern in brightness difference when using a light. That is, we will notice that the light is a bit less bright once it heats up, but only a barely perceptible difference will be seen.

    Has anyone been able to make beam shots of the Mags cold versus hot? I think that would be interesting. ??

    Because I have two 2D Mag 3W LED drop-in bulbs. I fully expected to have to ruin one when revealing it's internal guts.


    Brightness difference, in a side by side, I have seen folks that can just make out 20% when I test them.


    I did notice the tint shifts as they get hot.

    Okay, here are two of these 2D 3W MagLite LED drop-ins, side by side. At the start they are equal brightness, very slightly different tints. I just set one up here for about 15 minutes, and let it run, and then turned on the other, and got a picture within the first minute.




    --------------------------------------------------------------------------


    Measuring the MagLite circuit was a little squirrley.

    The reason why is that it is not very efficient, and it produces lots of it's own heat all by itself (no LED).

    I measured it with the circuit board in open air, with an LED that was remotely located, the LED was very agressively cooled.

    The LED I used for the test with the Mag circuit has a little high of a Vf, I will be repeating the test later on with an LED of a lower Vf. I expect the circuit efficiency to increase a little with a lower Vf bin.

    It was neat to watch the circuit crank up the output power when you lightly blow on it, it responds very quickly.

    I would expect the circuit to deliver more power in the module, as it looks like the temperature measurement point would end up cooler in the beginning. But once the module heats up, it would crank the power down anyhow.

    I may end up having to modify a MagLite, with the module mounted in it, to get more realisitic numbers.





    --------------------------------------------------------------------------


    Hitting the circuit with chill spray, causes the current to jump up, and as it heats up, it draws more and more current, then it rapidly kicks down.

    At the peak (frosty cold), input current hits 1.952A, and output current hit 0.952A. Output power was 4.76W and input power is 6.04W. Efficiency in this state is 78.8%. This high power spot climbs from cold, hits a peak, and rapidly drops back down. I do believe it probably happens right at the same point that my chilled runtime plot I posted earlier peaks way up.


    --------------------------------------------------------------------------


    Okay, I took an uber low Vf G bin Luxeon I and re-ran the same test, under the same type of conditions as mentioned before:




    It was interesting to see the temperature hysteresis and thermal time constant interactions. Without the circuit mounted in the normal PR housing, the thermal time constant is faster, and you can watch it oscillate a bit, until it stabilizes.


    --------------------------------------------------------------------------


    Some folks wanted a clearer picture of the custom LED in the MagLite drop-in, this should clear up the custom leads on the LED:



    Here is the 4 Cell version of the drop-in:




    --------------------------------------------------------------------------


    The power side is nothing special, it is just a low efficiency non-synchronous buck, or low efficiency non-synchronous boost. Folks have been using circuits like this around here since 2002, but most have moved on to more efficient designs.

    I'll not be getting into the proprietary circuit on the other side, I will leave that up to the end user to figure out on their own.

    Now for modders, there are a few items in here that could be changed to improve the efficiency of the module, most notably is the schottky diode.

    On the "power side" of the board, we have the 33uF Tantalum capacitor, 10uH inductor, and the 0.1 ohm sense resistor.


    Okay, lets start identifying some of the semiconductors used on the power side:


    4 Cell
    S3G- Toshiba P-CH MOSFET part number TPC6107 (55 mOhms@4.5V Gate)

    2 Cell
    S2C- Toshiba N-CH MOSFET part number TPC6004 (32 mOhms@2.5V Gate)

    2 Cell and 4 Cell
    1L1 OnSemi Powermite Schottky Power Rectifier MBRM110L rated for 1A, 10V reverse voltage, 0.365 Vf @ 1A & 25C, Average power dissipation at 1A square wave 0.27W.


    --------------------------------------------------------------------------


    Another shot of the MagLite 3W LED module (3 cell shown here):




    Internal board pictures:




    --------------------------------------------------------------------------


    The standard step-down controller, without the MagLite modifcations, that is used on the MagLite 3 cell and 4 cell internal boards, and goes for 0.55 ea can be found here:

    http://focus.ti.com/docs/prod/folder.../tps64201.html


    Datasheet is here:
    http://focus.ti.com/lit/ds/symlink/tps64201.pdf


    --------------------------------------------------------------------------


    Quote Originally Posted by Ray_of_Light
    Newbie, I have a question for you, since you have disassembled them: is the solder leadless? I have read somewhere that the new leadless solder has a limited number of thermal cycles, then it cracks. END EDIT

    Anthony

    Good Question. I've been working with solder for 36 years now. Normally, all the lead-free solders I seen, have a grainy appearance to them, and they are somewhat harder then normal solders.

    This solder doesn't appear grainy (in some areas it does, but that may be the process and what floated off the leads, particularly the inductor).

    As you can see, on a close-up of one of the leads of the uber tiny SC-70 package parts, one sees none of the grainy stuff, just a little oxide in places. Keep in mind, these leads are small, ~0.225mm wide (~0.00886 inches) :


    Nor is the solder hard.

    I lack a lead test kit for a definitive answer, but these ones I bought at WalMart, appear to be done on a lead process.


    --------------------------------------------------------------------------


    Okay, started a runtime on a second "bulb", with the following results:



    This test is on going, the batteries are only down to 1.27V each at the end of 24 hours, so there is a very long way to go yet:



    --------------------------------------------------------------------------


    As promised, Moon Mode runtime plots for the 2 cell boost version, in a 2D light.

    The 3D and 4D buck would run alot longer...

    It was still emitting light in moon mode 184 hours later (over 7 days). The 4D would probably still be emitting light more than 15 days later...though I have not had a chance to do the runtime on it.




    ------------------------------------------------------------------

    If you take a look over at Quickbeam's site, he just did a review, with final runtime graphs in process on July 16, 2006. You'll notice these puppies are owning the EverLED, and pretty close to the Diamond for Throw and Overall Output. Please note that the human eye needs about a 20% difference in output in a side-by-side comparison test to tell which one is brighter, and for most folks, even 20% doesn't result in a 100% ID of the brighter one...

    Stock Maglite:
    http://www.flashlightreviews.com/reviews/maglite_3d.htm

    3-D
    Throw 6185 (78.65)
    Overall Output 2300 (23.00)

    4-D
    Throw 9720 (98.59)
    Overall Output 3800 (38.00)


    MagLite's LED module:
    http://www.flashlightreviews.com/rev...te_mag-led.htm
    2-D
    Throw 6800 (82.46)
    Overall Output 3800 (38.00)

    3-D
    Throw 7500 (86.60)
    Overall Output 4750 (47.50)

    4-D
    Throw 7000 (83.66)
    Overall Output4300 (43.00)


    EverLED:
    http://www.flashlightreviews.com/reviews/everled.htm

    3C
    Overall Output 1740 (17.40 standardized)

    3D
    Overall Output 2350 (23.50 standardized)

    4D
    Overall Output of 2440 (24.40 standardized)


    Diamond 3W
    http://www.flashlightreviews.com/rev...magbulbs3w.htm

    3D
    Throw 8400 (91.65)
    Overall Output 4200 (42.00)


    Most notable, you can see the Diamond drop in output in a bigtime hurry- to 50% output on the graphs. Well, the EverLED also drops in it's graphs. And if you look, you'll see even the Incandescent bulbs drop even worse. So the drop isn't unique to the MagLite LED module...

    A link for the poor incandescent bulb performance:
    http://www.flashlightreviews.com/reviews/maglite_3d.htm


    Keep in mind, the human eye needs about a 20% difference to even see a difference in a simultaneous side-by-side comparision...

    As usual, refer back to the first post in this thread for alot more details.
    Last edited by NewBie; 07-16-2006 at 04:13 PM. Reason: Adding all the info to the head post

  2. #2

    Default Re: MagLite 2C LED drop-in Techinical Review

    A good mod project could be the development of a heat sink. It should be a pretty simple task to make a "washer" type insert that fits down over the threaded retaining ring and rests snuggly against the inside of the body. Of course it would take different sizes for the C cell lights and D cell. That way it wouldn't have to back the power down as often.

    Good report, Newbie. Thanks.

  3. #3
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    Default Re: MagLite 2C LED drop-in Techinical Review

    Thanks for the stats, Newbie
    Although the pill's ability to turn itself down is a good thing, the lack of heat sinking kills the performance. I can see a thread-on heatsink/cap device epoxied to the Mag head becoming a very desirable quick mod to get the performance back. The reflector will have to be cut back but that is not a hard thing to do.
    All hail the Mag-LED mods for a serious thrower on the cheap
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    Default Re: MagLite 2C LED drop-in Technical Review

    I was thinking of a reverse U heatsink that replaces the PR lamp retaining nut, all integrated into one.

    It would be a "nut tube" that went part way down the tower stem, then would go across to the outside wall, and would contact the flashlight body over a 1-2" area.

    BTW, thanks, and you are welcome!
    Last edited by NewBie; 05-28-2006 at 10:04 AM.

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    Default Re: MagLite 2C LED drop-in Techinical Review

    Quote Originally Posted by NewBie
    I was thinking of a reverse U heatsink that replaces the PR lamp retaining nut, all integrated into one.

    It would be a "nut tube" that went part way down the tower stem, then would go across to the outside wall, and would contact the flashlight body over a 1-2" area.

    BTW, thanks, and you are welcome!
    Sign me up for one if you produce some!
    I have my HA-III bored 2D Mag waiting for the upcoming BAM mod (Aug/Sep) and the drop-in pill with reverse U heat sink would allow me to screw around with it while I wait. Then I can pull it out, make the BAM mod and get a wild color 2D Mag for the modded pill/heat sink.
    Peak Pacific AAA UP brass (EDC) E01 (keys), Peaks, Arcs, Fenix, Q5 Aspheric HA-III Mag etc.

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    Default Re: MagLite 2C LED drop-in Technical Review

    I don't have a lathe on hand.
    Last edited by NewBie; 05-28-2006 at 10:04 AM.

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    Default Re: MagLite 2C LED drop-in Technical Review

    Quote Originally Posted by NewBie
    ...As the module heats up, it looks like the circuitry severely kicks back the power to the LED, resulting in a major drop in output.

    It would be interesting to see how it would perform with better heatsinking.


    If I have time, I will do a better set of measurements, monitoring additional parameters.

    Newbie, are you saying there's some form of thermal protection built in to the regulator? It would be interesting to repeat the test but give the circuit a shot of freeze spray after it hits 70C. It seems that they biased the LED really hot (no pun intended) but with no heatsinking and with alkaline batteries in mind. With good thermal management and using NiMH, this thing would actually perform pretty good.

    I'd love to see runtime data. Better yet, replace the lux with a resistive load that closely simulates a "typical" (sorry to have to use that word) luxeon, say about 9 - 10 ohms, and do a power in vs power out. OK, that's a lot to do, maybe I'll pick one of these up and get my own data.
    Last edited by CM; 05-28-2006 at 10:30 AM.

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    Flashaholic* ABTOMAT's Avatar
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    Default Re: MagLite 2C LED drop-in Technical Review

    When these things were first mentioned Mag did say they were thermally protected. It's an interesting way of handling things. I like that idea for the drop-in modules (to keep the greater public from cooking their LEDs) but I'm rather dissapointed that it appears the turnkey C/D Mag-LED lights will work the same way. I mean, when developing a new product line it wouldn't have killed them to add a heatsink.

    Since I haven't been much of an LED guy, how do other PR-base Luxeon drop-ins handle heat? Run wide open and hope for the best?
    Do something alone and it's weird, do it with others and it's a club.

  9. #9

    Default Re: MagLite 2C LED drop-in Technical Review

    How bad is the donut hole with this light when focused away from a spot beam?

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    Default Re: MagLite 2C LED drop-in Technical Review

    Quote Originally Posted by ABTOMAT
    ... I mean, when developing a new product line it wouldn't have killed them to add a heatsink.
    It would not be a simple drop in solution anymore. What would be great is a totally brand new product unencumbered by decades of baggage. Not to say to scrap everything they've done. Rather, they could have modified the existing design and utilize it's incredible heatsinking capability of the large form factor 2C/2D bodies to give us a light that would outperform Surefire LED lights like the KL1/KL3, L2 etc. using cheaper mainstream alkalines or switch over to NiMH for higher performance. Since hitting the store shelves in the last several days, EVERYONE seems to be talking mods already with the heatsink being at the top of the list. Maybe the drop in is a transitional product and that Mag will eventually evolve their line towards something similar to what I've talked about.

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    Default Re: MagLite 2C LED drop-in Technical Review

    Quote Originally Posted by CM
    Newbie, are you saying there's some form of thermal protection built in to the regulator? It would be interesting to repeat the test but give the circuit a shot of freeze spray after it hits 70C. It seems that they biased the LED really hot (no pun intended) but with no heatsinking and with alkaline batteries in mind. With good thermal management and using NiMH, this thing would actually perform pretty good.

    I'd love to see runtime data. Better yet, replace the lux with a resistive load that closely simulates a "typical" (sorry to have to use that word) luxeon, say about 9 - 10 ohms, and do a power in vs power out. OK, that's a lot to do, maybe I'll pick one of these up and get my own data.

    Wow, after it was hot, I hit it with the freeze spray and the intensity kicked way up. I re-ran things, starting off with the slug cooled to -40C. The thermal protection looks like it starts to kicks in around 20C.

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    Default Re: MagLite 2C LED drop-in Technical Review

    Quote Originally Posted by NewBie
    Wow, after it was hot, I hit it with the freeze spray and the intensity kicked way up. I re-ran things, starting off with the slug cooled to -40C. The thermal protection looks like it starts to kicks in around 20C.
    Excellent! Newbie, after half an hour running continuous, will the output revert to anything close to what it was in the beginning, after you hit it with cold spray? I'm trying to guage if the cells have enough energy left in them or if the circuit is efficient/inefficient. I'm going to try to pick one of these up later today and see how big an effect a heatsink would have on the output. The circuit sounds like it has some level of sophistication in it.

    OK, who stocks these things? I've read Home Depot and wally world, anyone else? I hate fighting the crowd at either place, especially ww.

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    Default Re: MagLite 2C LED drop-in Technical Review

    Just wondering, if the drop in output is JUST because of the rise in LED junction temprature and NOT due to some sort of 'temprature control engineering'... is it true?

    as otherwise observed that the light output will be down as temprature rises.. isnt it?

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    Flashaholic* TinderBox (UK)'s Avatar
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    Default Re: MagLite 2C LED drop-in Technical Review

    I just had a look at my 3D, It`s not going to be simple to heatsink the bulb socket, as the socket is sping loaded to rise and fall inside the reflector as you turn the head to focus the beam.

    I allways wondered why the bottom of the reflector was shaped that way, it presses on a brass rivet and forces the bulb holder to rise and fall in a sort of a cam action.

    anyway it looks like it will be fun to heat sink it.

    regards.
    Last edited by TinderBox (UK); 05-28-2006 at 12:24 PM.
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    Default Re: MagLite 2C LED drop-in Technical Review

    Quote Originally Posted by TinderBox (UK)
    I just had a look at my 3D, It`s not going to be simple to heatsink the bulb socket, as the socket is sping loaded to rise inside and fall inside the reflector as you turn the head to focus the beam.

    I allways wondered why the bottom of the reflector was shaped that way, it presses on a brass rivet and forces the bulb holder to rise and fall in a sort of a cam action.

    anyway it looks like it will be fun to heat sink it.

    regards.
    That was my point in a previous point about "drop-in" I think you would need to modify the reflector and then use the hotlips heat sink idea. I think it can be done but I need to get one of these to see what is the simplest way to conduct the heat to the main body. Of course, you will lose the capability to use the regular PR incandescents afterwards. I don't see that as a big loss.

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    Default Re: MagLite 2C LED drop-in Technical Review

    Quote Originally Posted by CM
    Excellent! Newbie, after half an hour running continuous, will the output revert to anything close to what it was in the beginning, after you hit it with cold spray? I'm trying to guage if the cells have enough energy left in them or if the circuit is efficient/inefficient. I'm going to try to pick one of these up later today and see how big an effect a heatsink would have on the output. The circuit sounds like it has some level of sophistication in it.

    OK, who stocks these things? I've read Home Depot and wally world, anyone else? I hate fighting the crowd at either place, especially ww.

    Yes, if you freeze it, on it's way down, it's output returns to normal intensities.

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    Flashaholic* TinderBox (UK)'s Avatar
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    Default Re: MagLite 2C LED drop-in Technical Review

    better idea, aluminum maglite reflector, that presses on the brass rivet and transfers the heat away from the LED.

    regards.
    Last edited by TinderBox (UK); 05-28-2006 at 01:07 PM.
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    Default Re: MagLite 2C LED drop-in Technical Review

    Newbie -

    Could you put a small hollow coil around the drop-in unit that can be fed by a little pressurized cylinder of freon? Hook a tiny valve up to a solenoid that is activated by the thermal protection circuitry. That should solve the output problem.

    I'm sure you have these parts just laying around. Could you whip up a couple hundred of them? I'll be watching Homemade BST.

    Seriously...great study and presentation. This is highly appreciated.
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    Default Re: MagLite 2C LED drop-in Technical Review

    Okay, well I froze the light body (without the batteries). I installed the room temperature D cells into the flashlight. Then I used M.G. Chemicals Super Cold 134 Plus (which can cool to -51C) Catalog #403A-285g to freeze the head section, to include the pillar/post and LED assembly. As soon as the LED slug rose to -40C, I started the test.

    You will note a few quirks in the MagLite 2C LED 3W module as it is warming up.

    FYI, the ambient temperature, in the room where I ran this test this morning is unheated, was 7.8 C (46F). It was about 10C cooler in the room than the test I ran yesterday.

    If the ambient is warmer than 7.8C (46 F), then the LED would heat up more, and the light output would drop even further. It would also drop sooner.

    Last edited by NewBie; 05-28-2006 at 01:32 PM.

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    Default Re: MagLite 2C LED drop-in Technical Review

    looking at the first graph, what's your call for the runtime to 50% brightness?

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    Default Re: MagLite 2C LED drop-in Technical Review

    Quote Originally Posted by watt4
    looking at the first graph, what's your call for the runtime to 50% brightness?

    About 5.7 minutes, if you have it out in the cold appliance room, and the room temp is around 57 F (13.9C).


    For those concerned about battery drop... An Alkaline D cell has over 20,000 mAH in it, and the test depletes less than 5% of the capacity.


    These are not those tiny cells you are used to dealing with...


    As time permits, I will add data using a constant voltage power supply, set to 3.1V and also plot the output vs. voltage input, after the LED temperatue has stabilized (takes about an hour to really fully stabilize).

  22. #22
    Flashaholic* ABTOMAT's Avatar
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    Default Re: MagLite 2C LED drop-in Technical Review

    What I meant was that the switch/bulb tower assemblies of the complete C/D lights could have been redesigned to allow for heasinking, or designed with an integrated LED. Although probably the focus system would have to be much more restricted.

    The new LED models just being incans with a drop-in is just an awful case of shortcutting, given the oppertunity. I can't believe designing the all-new AA lights took all their R&D capacity over the last couple years.
    Do something alone and it's weird, do it with others and it's a club.

  23. #23
    *Flashaholic* PhotonWrangler's Avatar
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    Default Re: MagLite 2C LED drop-in Technical Review

    Interesting tests, Newbie. Thanks.

    I tooo am disappointed to see that the runtime at >50% brightness is severely curtailed as a trade-off to avoid the need for a heatsink. I have to give them credit though for making something inexpensive that protects itself from thermal damage. Given that the average user only uses their light for a few minutes at a time, the light duty cycle should allow for good brightness most of the time.

    This would seem to rule out it's use for applications like caving or firefighting though.

  24. #24
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    Default Re: MagLite 2C LED drop-in Technical Review

    I think we are slowly learning a bit more on these drop ins. I was dissappointed by the results of Newbie's tests. It seems to confirm some of our earlier fears about this item. I was hoping for good extended usage with the D cell lights, but this thermal protection kicking in quickly throws a monkey wrench in the whole thing. If it dims down so soon, it kills my requirement for extended usage. Having to come up with a new heatsink mod on a newly introduced product is hardly an endearing proposition. I must admit, I kind of expected more from MAG. Oh well, its early in the game, so I guess we'll just watch and see where all this leads. I'm still looking forward to the new Mini MAG. That looks like a nice one to try. Especially for under 30$.
    The only light I need now is the "light at the end of the tunnel".....

  25. #25

    Default Re: MagLite 2C LED drop-in Technical Review

    My thoughts on a heatsink in the form of a washer shape device obviously won't work; at least not with the focus mechanism as is.

  26. #26
    *Retired* NewBie's Avatar
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    Default Re: MagLite 2C LED drop-in Technical Review

    Okay, I hit another Walmart and scored some stuff:








    As it turns out, I opened this Maglite 2D 3W LED, really hoping to see some innovative heatsinking, and all I found was just a standard Maglite with the LED module in it:



    One of the funniest things I found, is they still include the incandescent spare in the base of the MagLite LED 2D 3W.

    Yes, it dims just like the LED module does when placed in a regular MagLite.
    Last edited by NewBie; 05-28-2006 at 08:13 PM.

  27. #27
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    Default Re: MagLite 2C LED drop-in Technical Review

    Even dimmed it will probably be bright enough for extended run times.

    Question:

    Does the battery current drop as the protection kicks in?

    Thanks.

    wwglen

  28. #28
    *Retired* NewBie's Avatar
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    Default Re: MagLite 2C LED drop-in Technical Review

    Quote Originally Posted by wwglen
    Even dimmed it will probably be bright enough for extended run times.

    Question:

    Does the battery current drop as the protection kicks in?

    Thanks.

    wwglen

    Yes, the current drops *alot* from cold to hot (72.7C or 161 F), in a cold ambient (I've been running in 45-55F ambient). Even the 10C difference makes a surprisingly big impact. I would expect these MagLite LED modules and MagLite LED flashlights to not perform as well in a warmer area of the country. When the module is hot, soaking them with alot of with cold spray causes the light output to jump back to when you first turned it on, and the current goes right back up at the same time.

    In case anyone needs the SKU's to look around Walmarts in their area:

  29. #29

    Default Re: MagLite 2C LED drop-in Technical Review

    Unbelieveable. You'd figure with mag innovation they would find a efficient
    way to move heat to those HUGE aluminum bodies. At that price if there
    were head pipes moving head along the side of the bodies I'd buy them.

  30. #30
    *Retired* NewBie's Avatar
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    Default Re: MagLite 2C LED drop-in Technical Review

    From the packaging of the Maglite 3W LED Upgrade, for those who want to know:




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