New (October 2013) LED wingtip landings light discovered

[tikicarver]

You will probably have to wait a while to get them if you want to play with them. Mouser says they will get 40 in April and they are 9 week lead time.

Also noticed from the specs they run at 70 volts. So to use them in an airplane you will need a power supply.

Did some quick math on the Trustfire light. It looks like they are only driving the LEDs at 1.5 amps which is half their max rating.
From the measurements, at 13.8 volts they draw 1.25 amps
that is 17.25 watts going in.
these drivers have about 90% efficiency
so that means 15.525 W delivered to the LEDs.
the XMLs have a forward voltage of 3.3v , so they are in series give us 9.9v
that means they are getting 1.5 amps
They probably are under driving them because of the heat.

[tikicarver]

Some more info I gathered on the Trustfire lights form the flashlight forums:

There are two models out there with apparently different drivers. (there are also the clones)

http://www.manafont.com/product_info...7443?rp=522815

http://www.manafont.com/product_info...7354?rp=522815

I never trust the specs they list with the stuff that comes form China.
It says the real Trustfire is rated at 12.6v, but i have run it at 14 v and it seems to be ok.

Here is the driver that is in the "real" Trustfire. Found what it was because a guy dissected his and posted pics. then someone else found it listed.
http://www.manafont.com/product_info...7973?rp=522815

Also, I found out the LEDs are wired in parallel, not in series.
This makes sense why the light will turn on at around 3.1 volts in.

I also ran another test on the "real" Trustfire and my clone. using a power supply I ramped up the voltage from 2.5v to 14v and measured the current and the Lumens with a meter.
The real Trustfire comes on at 3.1v, and gets to full brightness at 3.7.
My clone comes on at 2.3v and the current ramps up much faster, so they definitely have different drivers in them.

So I have concluded that if you plan to use one of these lights in an airplane with 13.8 bus voltage, you need to test the driver to make sure you have one that is compatible. the one in my clone is not. In mine after I go above 10v the current starts rapidly increasing.

I will put my data into a spreadsheet tonight and post it.

[Bavafa]

I have little test equipment to test the one that I got but here the little info I can provide.

It is a Trustfire 11000LM (not sure if it is a clone or an actual Trustfire). I hooked it up to the car battery and the airplane battery, it worked without any issues. I also ran it with the ship power while flying and my typical buss voltage is about 14.1v, again no issues.

While on the ground, I hooked it up to an amp meter and it would start just around 3A and slowly go down to about 2.86 or so. I can not explain why the amp reading goes down as my voltage does not change much but three or four time testing yielded the same result.

[tikicarver]

If we do the math on those numbers, it looks like they are driving the LEDs with almost the same current as the small Trustfire

14.1v x 3a = 42W going in
with 90% efficiency on the driver that gives 38 W to the LEDs.
My guess is they have 3 strings of 3 LEDs in parallel, so that would mean
each LED string is getting 1.36 amps. A little less than the small Trustfire.
So basically this monster should have about 3 times the output of the 3 LED light. However, it will also produce more heat so you have to watch that.

Would love to see a photo of it in action.

[Bavafa]

Originally Posted by tikicarver

If we do the math on those numbers, it looks like they are driving the LEDs with almost the same current as the small Trustfire

14.1v x 3a = 42W going in
with 90% efficiency on the driver that gives 38 W to the LEDs.
My guess is they have 3 strings of 3 LEDs in parallel, so that would mean
each LED string is getting 1.36 amps. A little less than the small Trustfire.
So basically this monster should have about 3 times the output of the 3 LED light. However, it will also produce more heat so you have to watch that.

Would love to see a photo of it in action.

In terms of brightness, the only thing I have to compare it with is my existing 35W Xenon lights and they just don?t compare, much brighter. The good news is that I don?t believe heat would be an issue. I had them on probably at most for 5 minutes duration since I did not want to run my battery down but it was hardly noticeable to touch, if at all. I was also very pleased to see no noise issue at least one that I could detect. My Xenon puts out some noise and that is with the string of ferrite that I have put on them. I have ordered a second one and am hoping to be of the same thing. I will post pictures when I have them, including installation.

[Canadian_JOY]

Mehrdad - do you have a link to the Trustfire you've purchased? Not sure I've seen any with 11,000LM advertised.

[Toobuilder]

Originally Posted by Bavafa

...I have ordered a second one and am hoping to be of the same thing. I will post pictures when I have them, including installation.

From the pictures available, it looks like these are essentially a scaled up version of the 3 CREE versions. If this is the case, then mounting via the lens cap ring and power connections through a cut down body will be easy.

Also, I noticed there is a 11000LM Ultrafire in addition to your unit. They appear to be similar in appearance and price. Wonder if the quality differs?

[Bavafa]

Originally Posted by Canadian_JOY

Mehrdad - do you have a link to the Trustfire you've purchased? Not sure I've seen any with 11,000LM advertised.

Yes, I bought them from e-bay and they ship them from US (CA). The second flashlight is taking longer to be shipped, not sure what is the hold up.

http://www.ebay.com/itm/TrustFire-Cr...item58a841543e


I had been hoping to get them by this weekend so I can mount them as I have alreayd made the mounts for them. But I doubt I will be getting them by the weekend so we will have to wait for my full report

[BillFear]

Originally Posted by Bavafa

Yes, I bought them from e-bay and they ship them from US (CA). The second flashlight is taking longer to be shipped, not sure what is the hold up.

http://www.ebay.com/itm/TrustFire-Cr...item58a841543e


I had been hoping to get them by this weekend so I can mount them as I have alreayd made the mounts for them. But I doubt I will be getting them by the weekend so we will have to wait for my full report

Wow, what a price. I thought the 9 XML LEDs cost more than that! I assume this is an imported clone of the trustfire?

[Bill Dicus]

Ron: Found the lights you described at our Costco yesterday - they are amazing! Thanks. Bill