"----Ultrafire Cree C8----":http://www.aurabuy.com/ultrafire-c8-cree-q5-5-mode-350-lumen-white-light-led-flashlight-torch-black-1-18650.html
Hi this is my first review on this site. Im very active on LPF and was asked to do a review of the Ultrafire C8. Aurabuy have since asked me to post the review here as well!
So Ill start off with some pics and then give a run down of the various components of the light and then move on to some tests and beam profile shots. Ill also give a number of stars * out of 5 for each category. Unfortunately, I dont have a light meter so I cant give LUX readings.
Specifications ***
Brand: UltraFire
Model: C8
Material: Aluminum alloy
Emitter Brand: Cree
BIN: Q5
Color: Cool white
Number of Emitters: 1
Voltage Input: 3.6~4.2V
Battery: 1 x 18650 Battery (Not Included)
Circuitry: 1200mA
Brightness: 350lm
Runtime: 2~5 hours
Number of Modes: 5
Mode Arrangement: Hi > Mid > Lo > Fast strobe > SOS
Switch Type: Reverse clicky
Switch Location: Tailcap
Lens: Plastic lens..............Actually a glass lens :)
Reflector: Plastic SMO + OP
Strap Included: Yes
Clip Included: No
Beam Range: 300 meters
Dimensions: 5.79 in x 1.77 in x 1.77 in (14.7 cm x 4.5 cm x 4.5 cm)
Weight: 4.48 oz (127 g)
Price ****
The price is reasonable and similar to most other sites offering this light. When I first did this review the light was being offered at $ 6.99, but since then Aurabuy has put the price up to $10.30. Even still, at this price it would be worthwhile considering for a XM-L2 U2 mod or something similar. I was actually going to have a go at an MT-G2 mod, but due to the very small size of the pill, there isnt much room for a copper heatsink.:(
Shipping, Delivery and Communication ***
When I did the review I had some issues contacting Aurabuy. It seems that the person I was dealing with left the company. As a result I cant give an exact delivery time for the light. I'm going to have to hazard a guess at 2 weeks, which is based on other items I have since received for review.
Well the good news is that the package was very securely packed! I don't think Ive seen quite as much bubble wrap before! They also kindly included a charger and battery. Below are some pictures. :)
Please excuse the quality of the first 4 pics, they were taken with a camera phone as I was a little impatient and had to immediately unwrap it. :bigsmile:
Build *
The host is aesthetically pleasing and sits well in the hand. It has a big reflector and throws very well. The spill, or flood light, is rather poor however. Unfortunately the reflector is made of plastic so if you wished to mod the light with a more powerful LED, youd probably have to replace it. The clicky is a reverse clicky, which means no "momentary on" but you can click through the modes by partly depressing the switch. It remembers the last mode and so each time the switch is depressed it moves to the next mode. The modes are High:Med:Low:Strobe and SOS.
Here are some pictures of the light:
This is a picture of all the bits that make up the light:
This is a zoomed in shot of the pill and 16 mm LED star and as you can see there is no heat sinking material between the star and pill. This is *really bad*, especially considering the currents the LED is run at! More on that later. The other issue is the exposed L+ wire, which is almost touching the star. Considering this host is electrically connected to the negative of the battery this could cause a direct short of the battery if the host were knocked or dropped. The second picture shows the plastic insert which holds the star on the pill.
The driver is very basic and appears to be one of the really cheap unregulated varieties, as the current increases with battery potential. The soldering leaves a lot to be desired, but it does work. The modes are controlled by PWM and there is no visible flicker when the torch is moved rapidly. However, a high pitched humming sound can be heard in MED and LOW.
The next two photos show the clicky mechanism and how it is assembled into the host. To be honest the contact for the negative is quite beefy, which affords a good strong physical connection. All too often these contacts can buckle and break when removing the tail cap assembly. The clicky although cheap, provides enough resistance with a nice definitive click.
I tested the the current both at the tail cap and at the LED. To measure the LED current, I soldered my DMM between the L+ lead from the driver and the L+ pad on the star. This is the setup and I could quickly click through the modes and note the current.
I tested with both the Ultrafire 18650 provided and an AW IMR 18650. Not surprisingly the AW outperformed the Ultrafire. ;)
Readings at Tail Cap
...................Ultrafire............AW
High...............2.06..............2.69
Med................0.98..............1.15
Low................0.42..............0.50
Readings at the LED
...................Ultrafire............AW
High...............1.45..............1.90
Med................0.65..............1.85
Low................0.32..............0.43
Output ***
These pictures show the dot profile at approximately 1 m from a white wall. All the exposures, in the sets, were identical as the modes were cycled through. The first set are exposed at 1/40 and the second set at 1/125 as a comparison.
In the next set of photos, Ive zoomed in on the hot spot a little using the lens and set the exposure to 1/100. This has enhanced the blurred area to the top right of the hot spot. This is not a problem with the torch, but rather a result of the positioning of the emitting surface of the LED, within the Q5 emitter chip. This can be seen in the cropped photo below the set.
Conclusion and Rating ***
Well Id give this a 3 out of 5 - Its a pretty average light. The build quality rating was definitely hampered by the lack of proper heat sinking for the star and the blatant lack of thermal compound. The possible risk of shorts with the battery was also a big concern and I shortened the exposed leads and re-soldered them to the emitter. Funnily enough when I screwed the pill down properly into the host and put it back together again the glass lens rattled around in the front! It turned out I had to partially unscrew the pill to get everything to fit back together properly! This will also have a detrimental effect on the heat sinking ability of the host on the pill. :(
Despite the draw backs I was quite pleased with the throw of the Q5 emitter and I think that this could make a very handy torch for someone specifically looking for that. The price was also a no-brainer especially if somebody wanted to use it as a laser host...;)
The flashlight was provided by Aurabuy for the purposes of a review! Thanks for reading. :beer:
Since I did this review Mia (cooperate@aurabuy.com) has kindly said that she would be happy for you to contact her should you want a discount on a particular light!