Review: JetBeam Jet-I MK XP-G2

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Budda
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Review: JetBeam Jet-I MK XP-G2

I received the Jet-I MK from GearBest for the review.

Specifications: LED: CREE XP-G2 LED Power Source: 1 x AA OR 1 × 14500 IPX Rating: IPX-8 (Waterproof and submersible up to 2 meters) Impact Resistance: 1 meter Brightness Outputs: Turbo (14500 Only) – 480 Lumens – 30 Min. High – 150 Lumens – 1 Hour 6 Min. Medium – 30 Lumens – 9 Hours Low – 1.5 Lumens – 100 Hours Peak Beam Distance: 130 meters Peak Beam Intensity: 4200 cd Dimensions: Length – 3.28” (83.2 mm) Head Diameter – 0.55” (14.0 mm) Body Diameter – 0.77” (19.5 mm) Weight: 0.59 oz. (excluding battery) (16.7 g)

The Jet-I came in a plastic box, that can be opened without cutting any plastic.

Inside each box you will find: the light with the clip installed, spare o-rings, lanyard, instructions and warranty card.

The anodization is on the grey side of the spectra.

Rather smooth body, with knurling on the head and a peculiar tailcap design. There is a tripod mount drilled in the tailcap.

Physical polarity inversion protection at the head, so no flat top cells.

Threads came well lubed.

The stainless steel clip design is ok, but was lacking of tension (nothing a bit of pressure could not fix).

The XP-G2 CW emitter with the smooth reflector.

Some comparison pics with the other lights (Manker E11, Manker T01, Klarus Mi7).
The Jet-I is long 83 and 20mm wide and weights 17 grams.
Overall the sizes are comparable.

UI: fully twist the head to turn it on, untwist to turn it off.
Quickly untwist and twist again for changing the level (in high, mid, low, high, mid, low loop).
The light has memory mode.
There are no strobe/flashing modes.

Runtime and output
All the tests have been done using Eneloop Pro 2500mAh AA and a Efest IMR 14500 650mAh. Be careful with using unprotected 14500 batteries: when I stopped the runtime test of Jet-I high mode, I found my EFEST IMR at 1,2 volts. Ouch.

I measured 1017 Cd with the Eneloop PRO, and 3095 Cd with the Efest.

Sampling rate is 6” for the high mode, and 90” for mid mode.

Details of the plot

Beamshot at 0.5 meter from the wall



My thoughts:
This Jet-I is a simple old school twisty light. It is affordable and well built. On the rather long head there is a big portion of knurling, it makes really easy to twist the light.
The 3 output are well spaced. The high level is on the conservative side, ie not high in output as other lights, however is bright enough and very well regulated.
I think it would be a great for a gift: works with commonly available batteries and is easy to use.
Also, this light can be very easily opened. I opened mine by untwisting the front bezel with the back of a mousepad. There was some blue Loctite but it didn’t make enough resistance. I plan to keep the XP-G2 die format, but I will use a LED with more warm tint (according to my taste).

Thanks to: AntoLed for the LuxMeter and the Camera.

All my reviews, in italian and english, here: Lumenreviews.com

Edited by: Budda on 08/29/2016 - 15:59
RobertB
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I believe the screw hole on the end is for a glass breaker attachment

Budda
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I works fine for my tripod… I don’t know about that skullcrusher and I won’t definetly use one of them on this light.

All my reviews, in italian and english, here: Lumenreviews.com

everydaysurvivalgear
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The best use for that hole is a Magnet i put one in mine.

RobertB
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everydaysurvivalgear wrote:
The best use for that hole is a Magnet i put one in mine.

Great idea. Did you epoxy a magnet in there? How did you do it?

everydaysurvivalgear
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Yea mate i used superglue and i used a permanent marker to colour it dark. The size is 5mm by 3mm.

MG
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Thanks the review and fine close-up pics!

dhvl1357
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everydaysurvivalgear wrote:
Yea mate i used superglue and i used a permanent marker to colour it dark. The size is 5mm by 3mm.

Brilliant idea, bro! Link for where to get the magnet? Also, does it hold the light horizontally with an eneloop inside?

Cheers.

Slow is smooth; smooth is fast.

Gunga
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I put a small tritium vial in the hole. A bit recessed but not bad.

Tom E
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Nice Review! I already ordered one - for $12.59, it sure seemed like a great deal and your review confirms it.

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Hey mate it holds it vertical but not horizontal weird i think you will need a bigger magnet for that. Even vertical if you bump it hard enough it will come lose but mine sits inside the light maybe if you put enough glue to make it flush with the torch it will hold better. I bought magnets that are 1mm bigger but these seems stronger.
https://www.fasttech.com/p/1530002

RobertB
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everydaysurvivalgear wrote:
Yea mate i used superglue and i used a permanent marker to colour it dark. The size is 5mm by 3mm.

I had some 5mm X 2mm N52 magnets. I stacked two of them. A 5 × 5 would be about perfect. Thanks for the idea.

And Thanks Budda for the nice review!