The KD C8 line of torches has been around for years with newly released versions adopting the latest Cree LEDs. This newly released model comes with the Cree XP-L Hi and would be one of the cheapest torches on the market with this LED.


Not being an owner of any de-domed LEDs the appeal of an affordable XP-L Hi LED torch was very appealing. The specs of this new model looked impressive and although the driver current was listed a 2.5A, I suspected it was more in the region of 3A. The results show this to be correct. Overall I was impressed with the torch.

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The torch was ordered on the 22nd July and arrived approximately 3 weeks later on the 5th  August. This was via the normal free shipping option offered by KD.


The torch arrived in a white box which contained some bubble wrap. The box was sent in a padded envelope. No damage suffered during transit.

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Sellers/Manufacturers Specs

Multiple versions of the torch are sold by KD. These are,

  • C8M3T1 – 3 Mode (Med : 30% > Hi : 100% > Strobe) SMO Reflector
  • C8M3T2 – 3 Mode (Lo : 2% > Med : 35% > Hi : 100%) SMO Reflector
  • C8M3T3 – 3 Mode (Med : 30% > Hi : 100% > Strobe) OP Reflector
  • C8M3T4 – 3 Mode (Lo : 2% > Med : 35% > Hi : 100%) OP Reflector

The model reviewed here is the C8M3T2 version.

Features / Value: ★★★1/2


KD C8 C8M3T2 Cree XP-L HI V2 6500K 1600 Lumens 3-Mode SMO LED Flashlight - Black (1 x 18650)


Brand:

KD

Model:

C8M3T2

Flashlight Material:

Aluminum Alloy

Flashlight Color:

Black

Emitter Brand/Type:

Cree

Emitter BIN:

XP-L HI

Color BIN:

6500K White

Total Emitters:

1

Battery Configurations:

1 x 18650 Li-ion batteries (not included)

Voltage Input:

2.5V - 4.2V (4.5V MAX)

Switch Type:

Clicky

Switch Location:

Tail Cap

Modes:

3

Mode Memory:

-

Mode Arrangement:

Lo : 2% > Med : 35% > Hi : 100%

Circuitry:

Digital Regulated 2500mA Current Output

Brightness:

1600 lumens maximum brightness (manufacturer rated)

Runtime:

2 to 3 Hours (manufacturer rated)

Lens:

Coated Glass Lens

Reflector:

Aluminum Textured / SMO Reflector

Carrying Clip:

-

Carrying Strap:

Yes

Other Features:

Waterproof IPX-4 Standard

Dimension:

150mm (L) x 44.5mm (Dia. of Head) x 35mm (Dia. of Body)

Weight:

165g (not include battery)

Package Content:

1 x KD C8 C8M3T2 LED Flashlight

The listing describes the LED current as being 2500mA, which isn’t consistent with the driver included. The driver fitted to the torch appears to be the 3040mA version of the KD V2 LED Driver.

http://www.kaidomain.com/p/S020073.New-KDLIGHT-7135-V3-17mm-8-x-AMC7135-1-Cell-16-Groups-Flashlight-Driver-Board-1pc

 Features:
- Current regulation for all output mode (no PWM flicks even at low mode)
- As low as 3mA-5mA for low output mode
- Eight programmable outputs
- Low voltage warning below 2.8V
- High mode: Constant regulated at 3040mA
- 1oZ copper PCB, immersion gold surface
- 1.6mm double sided PCB, 17mm diameter, 4.8mm height w/o spring, copper spring loaded positive

 

Voltage support: 2.5V-4.5V
Battery types: 1xLi-ion or 3xNiMH/alkaline
Output version: 3040ma
LED support: XM-L, P7, SST50, etc. (3*XP-E, 2*XP-G wired in parallel)
Low voltage warning: under 2.8V, reduce output to 35%, and flash once per minute
Last mode memory: By soldering the bridge at S1, you toggle this setting (default off - disconnected).
Programmable outputs: By soldering the bridge at S2, S3, and/or S4, you get different output modes. (see product image for detail output and connections)

The torch reviewed is a 3 mode model. This is set via solder tabs. The Low, Medium and High is my favorite combination. Being set via soldering on the driver it may be limiting to some who seek the flexibility of being able to use Strobe. The UI on torches such as the Convoy C8 which has multiple groups may be an advantage for some on this point.

The spacing between modes may not suite all. The low mode (2%) is very low. The brightness between Medium and high is far closer.

Design / Build Quality: ★★★★

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The torch styling is typical of most C8’s. In the image below where is it very similar in shape to the Convoy C8 (Pill version). The quality of the host is excellent, it came with no imperfections.

 I’m unable to confirm the anodisation used here. May be type II.

 Threads are not too sharp, they are slightly square.

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The host screws were lubed at the tail cap end.

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The knurling of the body is good. Not quite as smooth as the Convoy, but well machined.

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Tailcap comes with a solid brass cap and metal retaining ring. No GITD button cover, only plain black.

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Tailcap switch disassembled

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Driver includes 8x7135 380mA regulators, 4 of which are visible on the bottom side of the PCB as per the photo below.

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Next is an image of the XP-L HI LED. The reflector is a smooth type made of Aluminium. The pill appears to be made of brass and is removable. The bin of the LED is unknown. According to item title it may be a V2.

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The pill is not glued in. It can be removed easily. The LED board appears to be 16mm x 1mm and is copper.

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Lens is approx. 2mm in width and may be plastic. Coating isn’t obvious.

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The light output is impressive.  Being a XP-L Hi with a smooth reflector it’s no surprise that it throws well. The centre spot is very focused. The three beam images below show the pattern. Images below taken at F4.0, ISO 100  and 1/320

Low (2%) is very low as mentioned earlier. The spot is visible with nil corona or spill.

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The medium setting (35%) brightness is significantly brighter. This time we see a much brighter spot with some rings in the corona. There is some spill.

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On the High setting we again see the rings around the corona.  The tint appears a little warmer than the 6500k listed. I have many 1A Cree LED torches and this one shows a slightly yellower tint.

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Tailcap and LUX readings.

The figures below are approximate as I’m slowly refining my approach to measuring tailcap currents and Lux. The LUX readings of the KD C8 were almost up there with the high performing HD2010 and well above the results achieved from the Convoy C8.

 

LED

Battery

Tail cap Current

Lux @ 1m

Estimated Throw (m)

Nitecore CU6

XP-G2 R5

 

 

9000

190

KD C8

XPL HI V2?

LG HE4

3.04A

37000

385

HD2010

XML T6 1A

LG HE4

6A

40000

400

Convoy C8 (OP)

XM-L U2 1B

Samsung 30B

2.8A

21000

290

The Nitecore CU6 was used to set a reference with measurements and used to “calibrate” my setup.

The recent arrival of LG HE4 batteries added another level of interest as I found that the tail cap current in my HD 2010 was measured at just over 6A. This was a big surprise and was quite different to the result achieved when using a freshly charged Samsung 30B battery (approx. 4.1A)

Tail cap readings, 

HIGH   3.04A, MEDIUM 0.9A and LOW 0.11A

The C8 design manages the heat well too. On high the head of the torch gradually warms, but not too hot to handle after 12 minutes.

Time (minutes)

0

1

2

3

4

5

6

7

8

9

10

11

12

Hotest Point (Celsius)

19.7

21.9

24.6

26.9

30.3

30.8

31.5

35.2

35.6

38.1

39.8

40.9

41.5


Conclusion

Overall I’m very pleased with the torch. The C8 continues to be a popular design due in part to its ability to be easily upgraded to newer drivers and LEDs.

The host design itself is not new, what sets this torch apart from other C8’s is the drop in. The 3.04A driver drives the XP-L Hi Led nicely leading to very good results on the high setting. For those on a budget seeking an affordable compact torch that throws well this is a good choice.

Reviewer's Rating: ★★★★☆

Pros:

  • 3.04A 8x7135 Driver
  • Nice thrower
  • 3 Light levels with Memory. LOW, MEDIUM and HIGH. Can be changed via soldering
  • Price is good considering the XP-L Hi is new to the market.

Cons:

  • Beam pattern is “ringy”
  • Low is very low.

Reviewer : Rolz @ BLF

Source : http://www.budgetlightforum.com/node/41330#node-41330