Very powerful light so you can see anything. Also has dimmer level so you will be seen. Clever.

Purchased 5.5 years ago. Running it for safety purposes (high viz) on road-bike I ride for cardio during daylight hours on street and bike-trails. Lotta miles. Battery still holding a good charge for at least 6-hours riding with light on strobe. Zero issues. Cover to charging port standing up to wear&tear. Can't ask for more.

Clamp will not fit a 31.8 diameter. Seems like it is limited to about 26mm max. This will not mount in the middle near your stem how I want it to. It does fit further down the bar where my flat grip is. But I don’t want it there. The light seems excellent quality, nothing wrong with it. But if you plan to mount to 31.8 look for something else this won’t work! Shame because the light really is awesome quality. Albeit quite a bit heavy. I returned it to search for a light that will fit 31.8

This is a high value headlight, which can work both as a daytime running light or as a reasonably powerful night time headlamp. The only downside is the mini-USB jack. It tends to loosen over time. My last one failed after several years of use, and became impossible to charge.

Solid all weather performance, bright enoungh for most mountain bike trails at near to regular speed. Very bright for city use. Battery life is long enough for non "epic" length rides.

The light itself is very good, bright and wide enough for nighttime commuting. But the attachment is terrible: it is way too small to fit on any taped handlebars. And while the light slides onto the attachment easily, it is then impossible to take off, especially with gloves: the little tongue is too small. The result is that after 15 minutes of finicking with it, one arm of the attachment broke off. Not sure where to get a replacement (...) Overall disappointing.

Excelente brillo, la durabilidad de la batería es buena, buena relación calidad-precio...

My cygolight is still new I just used it for few days. I like how this thing illuminates the path at nightI can see the road better than my cheap flashlight. Thanks

I am so F'ing tired of buying bike accessories that loosen up while I bike and can never be tightened again. Can any company in the world please make a bike light or phone holder that doesn't rely on a F'ing screw-to-stay-tight medieval technology? Anyone? please? Like every single bike accessory I've ever bought this light works great, for about 10-20 bike rides. Then the light starts to fall forward. Have fun trying to tighten it in the dark while it keeps sliding forward and pointing straight down. Oh, don't worry, you can duct tape your handle bars when you get home to so that you can tighten the light a little more next time. That'll last about 2 more rides before the light is pointing straight down again. F every company that sells these pieces of S screw-to-tighten pieces of crap.

Ultimately, I think the question is whether $50 is good value for a bike light. Most cheap lights are not very bright -- especially for daytime. For me, anything less than 250 lumens is annoying as I bike commute almost every day, with a significant amount of night riding in the winters. For something I use so much, it's worth it to me to pay more for something not only brighter, but also with better beam quality and visibility. For 700 lumens I couldn't find a better deal, 450-500 lumens wasn't much cheaper, and 950-1000+ lumens was overkill for a little more cost, so $50 was at the upper limit of my price target. I think $30 would have been more reasonable, though. This works really well for a few stretches of my commute where there are no street lamps and get very dark in the winter. I can see the road and avoid obstacles and potholes without major issues. I find the brightness less useful at night than for daytime in really shaded areas (too much ambient light), especially in mountain climbs. The battery life is pretty good, it's reasonably light and compact, and the color fits the clean black look of my bike. Other than the cost, the main thing I don't like is the mini-USB connection. Micro-USB would have been much better. Also, the rubber cover for the mini-USB connection has come off somehow. The handlebar attachment is barely big enough for my handlebars and the knob caught on my cables. I was able to solve the latter by replacing it with a wingnut from Home Depot.

So far, this has been a great light, its mid brightness is more then adequate to navigate paths at full speed in the middle of the night with no other light sources (street, house, etc.), its top brightness is almost too bright, and luckily the steadypulse is mid bright lasting for 3hrs and plenty of time for a 40mile night ride.I wish there were more steadypulse settings then just the one, and some of the others are kind of cumbersome when you are only trying to switch from steadypulse to a lower steady.One of the things I noticed is that its mid bright steadypulse was too bright for other oncoming riders kind of blinding them, just like a car on a unlit road with your brights, but for me to switch to a lower brightness was nearly impossible to cycle through all the modes in time before they passed you before you now needed it back up bright to medium to see adequately again yourself. After a few times of playing that game I finally ended up slapping my light to shine on the right of the path until I passed them and realigned it when they were by me. Probably not the ideal situation as I am sure it will wear out the mount pivot and start flopping around wherever it wants eventually.It needs a momentary switch (preferably external thumb toggle) I can hit to dim it until I hit the switch again to bring it back up to mid brightness just like a car.It could use a rainproof bottle battery connection for rides that are going to last more then the 3hrs it says the mid level has, although I haven't had it run out of juice on me yet. I have noticed that, while charging, the light will allow you to turn it on which is great as a lot of other lights won't allow use while charging...I think I can rig an external bottle battery pack and silicon seal a pigtail into the charging port to lead to a self made rainproof connection if I find myself needing that much juice. Or...just buy a second one of these lights and switch them out when one dies.Something I don't know and need to test is whether the light, when it is charging, and the light on, if there is an internal isolation that only allows an -on state- or -charging state- vs a simultaneous -on- and -charging- state because that would matter a whole lot and make the point of the bottle battery moot if it was the former.I am contemplating making an external thumb switch and soldering it parallel into the lights existing switch as the switch is resistant to accidental bump while in your bag or whatnot which is great, but when mounted on your handlebars the switch is a little bit forward of the mounts apex so that when you are finger fumbling the switch while riding and pressing, it tends to push the light downward eventually that might have been avoided if the switched had been placed a little further back either on or behind the apex.All things considered, this is so far for me (4mo) and by other reviews a great light for only $40 and its shortcomings are potentially very easily overcome as described above, in fact, thats kind of key with this light, that it is constructed in a way that you can take it apart and modify it easily vs other lights that are one and done factory glue sealed, and again, that charging while in use (if it works like I think) is a biggie that many other lights don't have.When I saw its cousin the cygolite dart 210 at REI, the staff who are a bunch of outdoor bike nuts typical of the Portland area couldn't stop talking about how great it was, and they are pretty honest folks, the only problem is that at the time they wanted some $38 or so for 210 lumens when amazon offered the metro 700 lumens for about the same price kind of a no brainer.