Review: Gerber Carnivore Blood Tracking Light with Pics

Ilikeshinythings

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Oceanside, CA
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For my college graduation my roommate bought me a Gerber Carnivore 'Blood Tracking Light'

According to the packaging which is a plastic clamshell, the light has "Trax Technology" which is basically just ultraviolet light. Now I don't have a whole lot of experience with ultraviolet lighting but this light utilizes four red and four blue LEDs in a pattern. Four red in an arc along the top and four blue in a diamond pattern under the red, and what does red and blue equal? Violet! Here is what the box says:

Trax Facts:
Ready for a science lesson? Research shows that the human eye is most sensative to the color red and much less discerning of dark colors such as blue and black. Gerber has finely calibrated multiple light spectrums in a way that makes the red of blood appear to virtually jump off the ground. Once you've found the trail, you can easily toggle back and forth between the bright white xenon light and the trax LED mode to locate your trophy and find your way home. Then you can get on to more important things, like picking the thistles out of your backside.

Some data:
Water resistant - Yes
Battery indicator (located under the Trax LEDs) - Green: full, Yellow: low, Red: replace
Bulb - 45 lumen xenon - replacement bulb: Gerber part # 22-80079
Trax LEDs - Lifetime L.E.D's never need replacing
Sheath - Holster style with vest clip included (cheap POS)
Batteries - 4 x AA alkalines included

I have shined the light on virtually everything that is red in my room and red colors really do seem to jump out when the LEDs hit them. Unfortunately I don't have any blood in my room so, pending any injuries I won't get to really utilize this feature for a while, and since I live in San Diego hunting is not part of the norm out here so I doubt I'll get to use it for that any time soon.

*Question for all you hunters out there: DO you do a lot of hunting at night? Because this light would be most useful at night.*

It contains a single O-ring where the main reflector is, and the battery pack on the bottom has three fin-like rubber stoppers on the inside to block out water. The battery pack holds four AA's firmly in place, and the bottom of the battery pack has a metal lanyard attachment. Lanyard came attached already to the light. The reflector appears to be made of plastic, and the lenses for both the LEDs and the Xenon are plastic. The LEDs appear to be sealed inside by a single rubber square-ring. I would give this light permission to be in the jungle rain but I would never recommend dunking it.

The beam pattern is interesting. The Xenon appears to be focusable, with a similar pattern to a lot of streamlight beams. At tight focus the beam appears as a tight spot with decent throw, and at loose focus the beam appears wide and has a hole right in the center. It may or may not be 45 lumens, but I can guarantee my streamlight scorpion (~50 lumens?) will out-throw this thing by a large margin. The reflector has a light texture to even out the beam pattern--it's not OP but it follows more of a square/rectangle patterning.

To operate the light you press the black (reverse clicky) power button behind the head. This activates the light in Xenon mode every time. To change modes, press the red selector button underneath the LED's like you would pull the trigger of a gun--this changes back and forth between LEDs and Xenon, but the light will always come on in Xenon mode as it should for safety reasons.

Body and battery holder are constructed from a very hard plastic, but the back and front of the light have rubber for grip. The red selector buttons would be a little small for use with gloves, but would probably be do-able.

Along with the Tracking light he bought himself a SOG knife called "Jungle Primitive" which is quite hefty and very VERY sharply cut. It has all kinds of serrades and could probably double as a machete. He also bought me a 50,000 spark flint attached by a lanyard called "FireFlash". This is something that may some day be incredibely useful. IMO everybody should own a flint just in case as a basic survival tool.

So here are some pictures!

Side View
IMG00018.jpg


Front View
IMG00019.jpg


Rubber Grip
IMG00020.jpg


Power Button
IMG00021.jpg


UV LED's
IMG00022.jpg


Xenon Reflector Close Up
IMG00023.jpg


Xenon On 3/4 view
IMG00024.jpg


UV Head On View
IMG00025.jpg


UV on "The Art Of Business" Red really shows!
IMG00026.jpg


UV 3/4 view
IMG00027.jpg


Xenon Side View
IMG00028.jpg


Xenon Tight
IMG00032.jpg


UV on the wall
IMG00033.jpg


UV close up front view
IMG00034.jpg


Xenon close up front view
IMG00035.jpg


Packaging
IMG00036.jpg


More packaging
IMG00037.jpg


Battery Pack Front
IMG00038.jpg


Battery Pack Bottom
IMG00039.jpg


Battery Pack Side
IMG00040.jpg


FireFlash Flint
IMG00041.jpg


FireFlash Flint 2
IMG00042.jpg


That is all for now.

DK
 
Last edited:
Um it's really not "UV" or even true Violet (I know it's weird, but Violet and Purple are actually different even though they can look almost the same).

I'm not a hunter, but in theory, blue light is supposed to provide contrast to make blood stand out. Blood (and a lot of other deeply red-colored things) will appear almost black under blue light, especially blue LED's; this is because blood absorbs blue light. If the blood is on a surface that is at least somewhat relective to blue light, the blood will appear as black spots on a blue surface.

Some people have said that this doesn't work very well when you actually try using it while hunting, and it's not too suprising. Sure, most leaves will probably reflect at least a little more blue light than blood will, but if the blood falls on brown soil instead of foliage, the soil might not reflect much blue light either, so there might not be enough contrast to tell the difference.

Some manufacturers have started using red and blue led's together, hoping that this would be more effective, but I'm not sure if the combination is really any better. Yes, this way the blood reflects the red light (so the blood looks red) and absorbs blue light, but in some cases this could give you "false positives". What I mean is that some non-blood-red objects (some yellows for example) will still reflect red light just as brightly, and might also absorb most blue. When using the red+blue led combo, you can only see the colors red, blue, and shades of purple in between them. Without green (or a wide range of wavelengths in the middle) your color vision is impaired.

But I'm not a hunter, so I've never actually tried using this type of light for actual blood-tracking. Maybe it works relatively well in most real world use.
 
Naughty, naughty marketers.

Blood tracking lights don't cause blood to light up in neon or such; they'll just help a hunter who knows what he's doing by simply providing more contrast to make blood easier to spot.

The eye is most sensitive to green, rather than red. Blood tracking lights use red because blood is red, and blue to enhance the contrast. This sort of lighting eliminates green, so foliage/underbrush seems to fade into the background while spattered blood seems to "pop". UV also isn't useful on fresh blood, so tracking lights don't use it. Blood doesn't fluoresce noticeably under UV until it's dried.
 
Judging from the grains...your using a webcam...and those are really nice pics from a webcam:D

oh...refrain from pointing the UV so close to the CCD or you might burn a "cigarette bun" into it the same way a direct strike from a laser would do....
 
Judging from the grains...your using a webcam...and those are really nice pics from a webcam:D

oh...refrain from pointing the UV so close to the CCD or you might burn a "cigarette bun" into it the same way a direct strike from a laser would do....

This light doesn't use UV LEDs. It uses red and blue LEDs, with wavelengths peaking around 463nm and 642nm.
 
So is blue and red just a really cheap way of trying to make violet, or is there something good or even better about this color combination as opposed to using ultraviolet light?
 
So is blue and red just a really cheap way of trying to make violet, or is there something good or even better about this color combination as opposed to using ultraviolet light?

Blood fluoresces under UV light if it has been treated with something like Luminol. It doesn't fluoresce under UV otherwise.

Also, I think you're confusing violet (visible light) with ultraviolet radiation, which is not visible to humans.

As darknessemitter said in post 7, the idea behind the red and blue is that fresh blood will reflect the red, the blue will add contrast, and green foliage will reflect neither the red nor blue light. This is supposed to make blood visually "pop" out of the background coloration.
 
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