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Gearbest SkyRay 4000LM 5 x Cree XM-L2

Mattronium

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December, 28, 2014 I contacted Gearbest representative May about reviewing the SkyRay 4000LM 5 x Cree XM-L2 (Sky - Ray 4000LM 5 x Cree XM - L2 LED 3 - Mode Highlight Flashlight (4 x 18650 Battery) and Free Shipping) for Gearbest. After a little talk she passed me along to Kathy and some time later it arrived.



Here are Gearbest's specifications:
5x XM-L2 emitters
4x 18650 Li-ion batteries
4000lm
3-modes
weight: 0.29 kg
Package size (L x W x H): 6.5 x 6.5 x 14 cm
Came with a lanyard and o-ring


So on to the review. :D


Looks:

In my opinion it looks very good.
Right out of the box it had very few scratches or marks on the body. It had one blemish in the anodizing and a few dents on the host before the anodizing was applied.

The bezel had a frosted appearance and one gray mark.

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In the battery compartment it was quite rough around the edges (literally), and it could potentially scratch up some batteries if they aren’t put in carefully.


Functionality:

This flashlight has the button/switch on the side as seen in the pictures; the button/switch works fine but is a little wobbly and loose. I think the button must have been put in backwards, because I rotated it around and it fit better with less wobbling.

The flashlight can easily do a tail-stand.
MODES-
Starting with the flashlight off the first click of the switch turns the light on high, the second click it goes to low (which seems more like medium than low), a third click turns the light off again. To access the strobe mode the button is pushed and held on, after 3 seconds the strobe turns on. The strobe is accessible from any mode and when the strobe is switch of, by a single click, the flashlight goes into the previous mode if came from. The strobe is “medium speed strobe”

Brightness, run time:
From what I can tell these are actually XM-L2 emitters.
Just visually comparing this light to my C8 with a XM-L2, this light is roughly twice the brightness. So very roughly 2000 lumens.

This next part is where the main drawback comes in. The five emitters are on a thin aluminum heatsinking plate, unfortunately that is where the heatsinking ends. The plate just sits there held by tape and not touching any other thermally conductive part. Using my precision temperature sensing tool (my hand, later calibrated using a FLIR camera) The plate reached about 115 degrees Fahrenheit in 20 seconds on high and took 45 seconds to reach that temperature on medium.



Mechanics:
Threads were squeaky when they came.
Bezel was very tight.

Initial:
20s on High
45s on medium


High = 3.42A @ 3.10V
Medium = 0.93A @ 2.21V


Summery
It has good functionality, brightness and feels good in my hand. If it were not for the poor heatsinking of the LED's this would be a very good flashlight that I would recommend.


There are some modifications that I did to the flashlight to extend its run time. I'll post the thread soon (I hope:beer:).



P.S. I will hopefully see if I can add a few more pics too.
 
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will manners

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No pill underneath the leds... not even worth the time to mod it, let alone buy one. You should point out the fact that the lumen rating
is of course grossly over-exaggerated, with only a 3.4A current draw it's unlikely that the output is any greater than 1000 lumens.

Please also mention that your link is an affiliated link that you gain credit for. Not doing so can come across as slightly conceited.
 
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Mattronium

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No pill underneath the leds... not even worth the time to mod it, let alone buy one. You should point out the fact that the lumen rating
is of course grossly over-exaggerated, with only a 3.4A current draw it's unlikely that the output is any greater than 1000 lumens.

Please also mention that your link is an affiliated link that you gain credit for. Not doing so can come across as slightly conceited.

Oh, I didn't realize that was an affiliated link.:( I'll change it. If I can figure out how? is it still an affiliated link? Not sure what part to cut out.


It's possible that my current measuring technique was slightly off, so I'd raise the absolute MAX output to 2000 lumens.
 
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Cyparagon

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There's no current regulation on these either, is there?

It's nice to see some actual DATA in a review for once. +7 when I can.
 

Pman

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I wonder what the unit I have actually outputs. Bought one that looks like that with 3 emitters from Fasttech probably 2 years or so ago for $43. Think it has XM-L T6. Traveling up to the Adirondacks tonight and will get there around 11PM so I'm bringing some lights and a couple lasers with me. Very curious how much brighter my my Jayrob PT-54 green mag vs. PT-121 green rig will be. The PT-121 will be run basically maxed out at over 5.7V and 27A which if I'm reading the data sheet correctly may be 5000lm vs. the 1000lm of the 54.
Also might compare the floods of them and the 1.5W 520nm laser.
Anyways, nice little review. +REP if I can;)
 




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