Poor Light Focus, Not An Effective 500 Lumens
938087
You can't believe the lumen specifications of this light, because the lens is so poor. The light produces a bright small dot and a very dim ring. I bought this light because it claimed to be very bright and it is rechargeable. I would strongly discourage buying this light and instead make sure to buy a light with an optical lens. A 200 lumen light with a good lens significantly outperforms this light.
4173709
The light is not focused well for my application. When I get close to the work the light is blocked.
3891072
I think I sent this back. Poor projection area size, light intensity was inadequate, and focus quality was low.
2655744
The high-output setting on this flashlight is like using a spotlight (500 lumens) -- really fantastic for surveilling distant objects, or for defense.  However, the low-output mode (15 lumens) is too dim for normal use.  Another 10 lumens on the low end would have been nice, and wouldn't have put too big of a dent in the ridiculously long 46-hour runtime.
3068356
Waaaaayyy too dim for what I needed, especially in the corners. I bought two of these, and they were both surprisingly dim compared to the pictures that others had posted. However, what it produced just wasn't cutting it for me. I think they may have BOTH been defective, since one was actually dimmer than the other. I liked the streamline/low-profile look of the lids, but the light output left a lot to be desired and it was too expensive to begin with to then have to try to modify it to make it better. I ended up returning both.
3780779
I picked up a pair of these, realizing that they are cheap Chinese made items. I have a number of other inexpensive Chinese made ligjhts so my expectations were not too high. Even so, I was disappointed. The light output is weak and the focus is abysmal. They might serve okay as backup lights, but that is the best that I can say about them. If you want a light that will actually be of any use on the front of your rig... don't waste your money.
2845541
NOT 3000 Lumen; more like 800 Lumen.  One plus, just interesting, the green ring rotates to move silicone LED chip towards or away from lense. Really not worth your money nor time.
3061911
Nowhere near 2000 lumens even on High; more like 800.  Mounting is OK.  Wish they could make a more compact body so it would be a pocket-able flashlight; seems they add lots of extra aluminum to the body's design to make it macho or something; it's over-large and bulky.  The included little white headlight and matching little red tail-light are good; buy this item just for them.
4463504
Bought this to light up my basement while doing work.  Although it is very bright, the focus of the light is down when in an overhead fixture.  The walls, particularly at the top were not well lit at all.
4633670
I purchased several of these to keep in my cars as a "throwaway" light of sorts.  I keep a personal light on me at all Times, but you never know when you may need an extra one around.

The claimed 300 lumens seems exaggerated even on fresh batteries.  The J5's light output is honestly not much better than an old first generation (~80 lumens) Surefire 6P LED which I've owned and used since 2008.  The zoomable light pattern is pretty focused, such that even at its flood setting the light has very little spill so it doesn't illuminate a very wide area.

The 3 mode switch is inconsistent at best.  Out of the six lights that I purchased, two of them don't switch modes correctly the vast majority of the Time.  Occasionally one of the modes such as the strobe won't even work, and then magically it might work once after you've cycled through the "three" modes 10 Times, and then not happen again for another half a dozen cycles.  A third light has its modes not work consistently.  I don't really care because they are cheap temporary lights, the strobe feature is a pointless feature and I wish there was a simple way to lock it out.  But if you're relying on all three modes to work consistently every Time, prepare to be disappointed but be happy if you get one that works correctly.

Having said that, I bought these lights for about 8 dollars a piece after a discount and they'll hang out in glove compartments as a small backup light.  They're not "tacticool" or high grade and at the price they're not bad, but they do leave me wishing that I'd just splurged a little and gotten better lights for a few more bucks.

You get what you pay for.  It isn't much of a flashlight, but it didn't cost much either.
392831
I was hoping to use multiple of these as a mini spotlight for a performance. Unfortunately after testing it out, this light isn't designed for projecting onto a surface 15 ft away.

Not only is the light source not bright enough, but the color mixing doesn't work well on surfaces. You can clearly see the four different individual LEDs used. (See attached picture).

The beam angle also isn't exactly as advertised. To project onto a surface, beam angle is fairly important. The advertised 6 isn't all that as accurate. As I said before, you can see the individual LEDs, this means for individual colors, the beam angle isn't the entire 6.

If you are looking for cheaper moving lights to be used at a bar or club along with haze, these might be beneficial. If you don't have haze, the color mixing isn't that great.

For beginner educational purposes, this might be a good moving head, but other than small functions, it's not the light for me.
784747
Gets a charge easily by shaking but has very poor range and low lumen output.
2366825
This light kit is not a substitute for an ARRI kit, they are mediocre at best.

I purchased these lights as a quick stop-gap solution to a lighting situation that I had and given the budget at hand and thanks to Amazon Prime next day, I couldn't find a better deal. They are by no means professional lights and should not be used as main lights for a set. However, they do a decent job as fill lights for a background.

The kit is and feels cheap made from roll form materials that are far from professional grade. The flags leak and spill a lot of unwanted light which is enough to not want to use them as a main lights since the light cannot be controlled due to the way the flags are manufactured and placed. They do come with a focus knob, but the amount of focus one can attain is minimal and not worth the effort.

In general I would warn the average consumer to not be fooled into thinking that they are going to get $2000 quality for $140 Dollars. They may be good enough for the amateur enthusiast, who might want to get his/her feet wet and at least it does beat using home depot halogen lights!
3223812
Light is non-uniform, and there is too much reflection. Focal length pretty tight, so limited use. But at least it actually worked.
1726301
I really wanted to like this light, but it's just not very bright. I would suggest getting one that has a few more lumens. I put this next to a 3000 Lumen light, and a 800 lumen light. It's hard to tell which is brighter next to the 800. I wanted to use this for a small room, and it just wasn't doing the job for me unfortunately. Also, when taking apart this light, it got stuck and would not come apart.
1768443
The LED light is too dim to get a good look at anything.  The second star is for the zoom and focus. It can magnify well but the lighting stinks and the quality of manufacturing is why it is under $ 20.  I almost got what I paid for.
2811209
Nice and light weight, well built, but very poor light output especially for a rifle.  I got the 200 lumen version and it's not even close to the brightness and light output of my 110 lumen surefire x300!  If the x300 puts out 110 lumens, the Inforce may be putting out 60 - 70 lumens in comparison.  This light is not adequate for a rifle!