This is a sturdy, well-made penlight which generates a very bright beam ...
598734
This is a sturdy, well-made penlight which generates a very bright beam for its size.  It has a push button on with two levels of brightness.
1197854
This is a truly outstanding light, and at $16.00, it competes with other lights in the $30 - 60 range in terms of build quality, form factor, and beam quality. I'm very impressed.

First, this is the UPDATED version of the original MicroStream, so if you've read older, pre-2011 reviews (many are still circulating online), you may be surprised to learn that this version has resolved several known issues with the older model. The beam is brighter (28 lumens instead of 20), battery run time is longer (2.5 hours instead of 1.75 hours), the tail switch is much stiffer (nearly impossible to turn on by accident in your pocket), and, though I have no way to confirm it, the anodized coating seems to be more scratch resistant.

Second, this light is very small. It is barely larger in diameter than an AAA battery, and the length is about the same as the width of my medium-sized hand (i.e., if you clutch it in your fist, you should be able to palm the entire light). The two-way pocket clip is reasonably stiff and very functional. It can be clipped onto your pocket for a more secure ride or onto the brim of a hat (or backpack strap, etc.) to hold the light for hands-free illumination. I've also clipped it onto the edge of a stroller as a very effective headlight to illuminate the pathway when pushing a stroller at night. The weight is so light you will absolutely forget that you're carrying it. It's only negligibly heavier than the weight of the AAA battery itself. Basically, if you have room for a tube of chapstick in your pocket, you have room for this light.

Third, the beam is very clean. It creates a nice, round, evenly illuminated circle of light with no hot spots or shadows anywhere in the center of the beam. The beam has a very effective reach (throw range) of about 15 feet. When you shine it at your feet, it casts a brightly lit circle about 18" in diameter. There is some spill at the edges of the beam, but not enough to illuminate the surrounding area, so it's closer to a spotlight than a floodlight (as any light of this size should be). It's ideal for illuminating a pathway at night, reading in the dark (though perhaps too bright for extended reading), locating a keyhole in a door, or momentarily blinding a potential attacker to gain an edge in a self defense situation.

Fourth, the light is certainly weatherproof and, theoretically, waterproof. I haven't tested the latter claim, but there is an O-ring seal on the barrel threads where the light screws together so I suspect it would certainly survive a drop into a puddle or other casual contact with water. I wouldn't deliberately take it diving, of course, but it's not a dive light so it hardly matters.

In short, I'm very impressed with this excellent, lightweight, perfect-for-casual-lighting-needs light. I'll probably buy several more and stow them in various places (kitchen cupboard, boat hatch, glovebox, office drawer, etc.) because they're so affordable and useful, yet take up almost no room.
1710737
This light bright and easy to mount. Feels solid and sturdy, made from a lightweight metal, that is not too heavy - (not cheap plastic). The mount is made with a high quality plastic and foam - with a single metal screw.  You can also easily take the light out of the mount and use it as a regular flashlight.  There are three different light settings for this light - high beam, low beam and flashing light. Also comes with a small flashing red tail-light.  Haven't had the lights long enough to see how long the batteries last, but being LED lights, I'm thinking they should last awhile.  Have a biking trip planned in a couple weeks so I'll put it to the test and post an update.  So far, so good!
2484949
This flashlight is well built and is very bright.  The size is actually quite small, not much bigger than three AA batteries.  I measured the electric current with a set of new AA batteries, and it was 0.47A.  So, the actual power is about 1.5 watts.  The light output is a lot brighter than my 1-watt Craftman LED flashlight.  Two 2700-mAh AA rechargeable batteries powered this flashlight for 6 hours. After that, the light became really dim.  Using AA batteries is a big plus, since AA batteries are cheaper and last longer than AAA.  Overall, this is an excellent product with a good balance of battery life, brightness, and size.
2037309
I love LED flashlights, and pretty much any LED technology for that matter. The brighter the better, and as far as I'm concerned you can never really have too many sources of light. Where I'm at there are a lot of trees, and storms with high winds have a bad habit of knocking the power out now and then, so that's when all these lights come in handy. So the TK120 is yet another light I bought.

It's constructed very nicely. All metal exterior, I am guessing aluminum, and the coating is anodized so it should last a very, very long time. The two places it screws together, toward the front and the back, have a rubber O-ring so moisture and dust won't be an issue with this light. The switch to turn the light on and off is on the back, and is protected by a thick rubber membrane which also serves to keep out dust and moisture. The light operates in 5 different modes: constant (bright), constant (medium), constant (low), strobe and SOS. These modes are activated by quickly turning the light on, off and then back on.

The angle of the light's beam is adjustable. The head of the flashlight slides forward and  backward to adjust it. With it extended all the way out, the  beam is very tight and focused. On the highest setting this is incredibly bright and can easily temporarily put some serious spots in your eye. With it retracted, the beam spreads out in a wide angle, easily lighting up a large area.

The metal case has a rough texture at the back, ensuring your grip won't slip even in wet conditions. The head of the light is fluted to provide a surface that's easy to hold as well. The nice thing about the sliding design for adjusting angle is the operation can be done with one hand, which leaves a hand free.

The TK120 comes with two long-lasting 3,000 mAh lithium-ion 188650 3.7V batteries, as well as a charger which can charge both batteries simultaneously. It also comes with a wrist strap to help prevent losing the light.

So with all that said, I give it a 4 out of 5 stars as there are other flashlights that are built just as solidly, and just as bright, but for half the cost of this light. I bought a different brand for my wife, and side-by-side her's is just as bright as this one. The only real difference is with hers the beam is adjusted by turning the head of the light. But I don't feel that the sliding mechanism of this light justifies the price tag at twice the cost. If they'd drop the price a bit I think this light would be more competitive, but as it stands I'd say the CVLIFE 2000Lm is a better deal.
2882322
This is a great penlight. Very small, short enough to easily fit in your pocket, jeans or shirt, and very well made. I like the metal switch, which compliments the fine appearance. The modes are simple, which I like and prefer, and the low light mode is just right for finding my way without drawing too much attention. The brightest mode is bright indeed, and I can see the logic in starting with the medium setting, although I'd prefer an option to start with low. Very even light spread with a center hot spot. Well done, and it has found a home in my pants pocket.
3225417
The main surprise is how bright this light is. And it seems well made, judging from its weight and materials - mostly metal, not plastic. I've been using it for three weeks without need to recharge it. It never fails to actuate and then to turn off. My only disappointment is that I thought it would not come on when there was ambient light (I.e. Enough that additional light is not needed). It always turns on with motion, even in well lit room.  Not really a big deal though, I'm quite satisfied. But that's why four stars and not five.
1792072
This is a very well made light that has a good sharp focused Hi-beam and the Lo-beam is sufficiently bright for general moving around at night and conserves considerable battery life, though I believe the "159 hours" advertised life for the low beam is a misprint. The similar C-cell model of this gets 49 hours on low so I wouldn't be surprised if 59 hours was more realistic for this.

Everything about this light is heavy duty and perhaps a bit to its detriment. It is pretty hefty for its size and could double as a club or a hammer. The extra size and heft doesn't necessarily make it better unless you are wanting to submit it for some extreme torture testing. They could have still achieved a high performance flashlight with a bit less heft. Rather strange in this day and age to be commenting about something being overbuilt, but it is heavier than it needs to be.

If you don't mind the extra weight, then this thing should last a long time as the only two things that could possibly get damaged would be the lens/LED or the switch. This light is made in China.
3723873
Well-built, sturdy, fantastic light projection: spot is very concentrated and bright, flood is a geometrically perfect and crystal clear circle. Sliding focus works great. Pushbutton switch works great. This is my second such light, as I unfortunately lost my last one in the Colorado mountains. I hope someone found it and now has an excellent flashlight for themselves. I am a flashlight collector and hoarder, and at present, this is my favorite.
215592
I was concerned I might receive a poorly made product, but it is actually well made and quite bright.  Battery lasts a long time -- far longer than I've needed it to perform various tasks in the engine compartment at night.  The magnets work well to secure the light to the hood or any ferrous metal surface.
2852705
This flashlight is very well made and very bright.  Yes there are brighter flashlights out there, but they are also a lot more money and some of them have questionable build quality.  The beam pattern has a nice throw and the beam adjustment does work just as all Maglites do. I have other LED flashlights and they don't work as well as this one.  I like that it uses standard AA batteries although is makes it a bit too big to carry in your pocket.  The only thing I would change is to make the outside more of a octagon shape so doesn't roll around as easy.
3165514
I really like this flashlight! It is incredibly bright, has five [5] settings that are easy to cycle through. Keep in mind that when you find the setting that you want, click the button on to hold that setting and keep it lit for at least two seconds. It comes without batteries, which is OK by me, AND it is duel fueled, which is what I really like. I bought Streamlight's 18650 battery charger with two 18650 batteries and this flashlight takes one. To double its run time, you can attach the provided extension tube and add another 18650. As it is duel-fueled you can use two [2] CR123 lithiums or four [4] with the extension tube. This light is very well made, is heavy duty, has a pocket or belt clip and comes with a strong tactical holster with Velcro closure.

I have other flashlights, including my ancient Kel-Light 5 cell that still works and has the original bulb. I also have a Streamlight Scorpion and Maglight XL-200. BUT, I really like this Raybek. It is much brighter and the SOS and strobe functions are great. So are the lower settings. The power button requires more thumb pressure than the Streamlight, but I can live with it.

Raybek is a small family-owned company with great customer follow up. All in all, this was a great investment and appears to be a really well made tough flashlight that will last forever.
239436
Very bright; appears to be a well-made product.  I mounted it to the backside of the bedpost (screws are provided) so the supply cord is out of the way and the light can easily be positioned to shine down for reading or upward for diffused area lighting.  Only complaint I have (and it's a very minor one) is that the spiral joint creaks as the gooseneck is manipulated, but perhaps this noise will diminish with usage.
569266
Man, this thing is robust!  Very Solidly built.  Don't let the modest lumen numbers fool you: this thing puts out a very useful flood of light.  Lighting is very even, suitable for painting.  Beam is extremely wide, so you don't have to constantly move your head.  Control is very intuitive and easily operable with gloves on.  Mine works great with lithium batteries too.
54014
90 lumens is just right for a pen light this size. The beam is a fixed medium spread. It lights up small and large rooms but is not meant to reach out down the street or across a field. it fits in my any pocket and the clip is very strong and sturdy. The butt button switch can be held halfway for a short job or "clicked" on for constant light. I have only purchased the black model. I have purchased 30 of these for staff, employees, friends and family and the overwhelming response is "wow, that light is bright and it fits perfect in my pocket." I kept 6 for myself.
1756624
I've purchased penlights in the past for home use. I like to have a focused beam for looking in my kid's ears or the back of their throat. I also use them for looking in tight spots where you can't fit a bigger flashlight. Some of the other penlights have worked where you had to push the clip in to make the contact. That was always a little difficult because having to apply constant pressure was frustrating. These pen lights are great because they have a push on/off on the end. They have a bright, focused beam and come with enough batteries for each pen light. Both of mine work well. Sample provided for review.
1041330
very good penlight.  Its bright so keep that in mind if you will be shining it in patients eyes.