This bike light get right what so many other bike lights get wrong.
340027
Here is the test I did for the battery:

On a full charge I turned the light on the brightest setting and left it on. It stayed quite bright for about 2 hours. After 6-9 hours the light was too dim to be functional. I would say there are about three hours of good light with this flashlight. Once it was completely dead, I charged it again and it took just over three hours to charge.

Here is why I think this light is better than other bike lights:
- Power indicator. Unlike most other lights, this light actually has an indicator to let you know when your battery is low. YES! Finally!
- Standard USB port. You can easily charge this with your phone charger. You don't need a special charger to lose.
- Waterproof. Cool beans. It has worked fine in the rain.
- Easy and firm mount. Installing the mount is easy and once the light is on, it is totally secure.
- Bright and adjustable. This is the brightest bike light I have ever owned.

The only thing that is not perfect about this light is I find it sometimes difficult to mount and unmount because the fit is so tight.

I received this in exchange for an honest review.
4453488
I bought it to replace my old light set after my bike was stolen.  Only complaint is the front light is a little weak but it still gets the job done.
1657569
It is a nice light.  Don't know what the lumens are but its bright enough.  Tail light is okay as well.  Since I live in a city and park my bike outside I need to remove the light when I park the bike. The holder system is a little awkward; it takes getting used to.  Better than other mounting systems which invariably, for me, break.
4534128
This is an excellent light for its purpose, I installed it on my daughter's bike in less than a minute, and we both went for a ride.up where we live there isn't many street lights and it is pitch black, this light made our ride more enjoyable.it also has a life time warranty with 100% satisfaction and a thank you card signed by the whole team. What else do you want?
3465044
This is one nice Bike Light.  Don't let it's size kid you, this guy may seem small but it fits perfect and gives enough light for it's purpose. The clamp works fine, again,  no problems with it slipping , not fitting or falling off. the two lights really give off a good warning for anyone around you. It is also waterproof, which is a great plus incase you encounter rain. I love that it has three modes, High  Medium and the Blinker, most call it Flash.  I like the Blinker if there is danger, or warning needed it will help.  This is a great little product every Bicycle Rider needs to have. It provides safety in a simple easy way.  Happy to recommend it and happy I received this product for a honest review.
4765208
After using this LED bike light for a month, I can honestly say I am satisfied with this purchase. I have used it for mountain biking and on bike trails. It has held up perfectly and not gotten loose. It is very bright at night for the various times I have used it. The blinking light feature is good to have and then the low and hi-beam. I would definitely recommend this product to any person looking to buy a bike light. Great value for your money.
3149400
For the money you cannot beat this for a bike light. I am usually out at 5 AM biking and this light up my path perfectly. I really thought it was going to be bogus. but it was a nice surprise. The headlamp is small but it still light up what's in front of you plus the flashing red light in the rear is good for traffic coming up behind you. Buy it...it's great.
485593
A neat marriage of an adjustable high tech led flashlight and a bike light. Uses 3 aaa batteries, zoom lens, high/low/flash options.
It works well on each of our different type bikes and the roads we have here. If you have an issue with the bike, the flash light comes out and gives you light. Also you can take the light with you when you lock your bike at work.
I am very pleased with the purchase.
2192772
It's a good little dynamo light. The pattern of light that it throws on the ground isn't as nice as the older Lumotec IQ on the other bike. But, it's suitable for the city riding i'll be doing with it. I'm intrigued with the possibility of wiring a tail light to the thing. That's next. Once that's done I'll never have to worry about batteries - hurrah.
4743162
This bike light has a mounting system that makes it more useful than most; it uses a multiple size clamp to mount the light to the bike and a second clamp to hold the light.  That means I can  mount it on the frame stem rather than on the  handlebars, giving me a steady forward light that doesn't weave as I move the handlebars.
That keeps the light on the road where I want it.
Let's see...what else>  It's bright, very bright and it's adjustable, letting me control both the beam size and the relative brightness of where that beam goes.  It uses standard AAA batteries rather than coin-cells.  That means you can keep it lit without breaking the bank.  You can remove the light from the clamp and take it inside with you.  That way it will be there when you come back. All in all, this is undoubtedly the best buy in a flashlight and bike headlight I've ever invested in.
2282951
We are big into bike lights.  I figure if motorists can see one, then they can see half a dozen better.

This one is one of the good ones.  Both my wife and I have them on slightly different types of helmets.  They swivel as they should, and as I always ride behind her I can see that they always are oriented the correct way.
1792543
Bought this for my bike and I use it to get back and forth in Portland OR. Super bright no problems with it. The front light is rechargedable. The back light runs on a battery. With a clip to keep it together on the bike.
4794086
This light is very good, and well worth the money.
I had to put a extra spacer around the handle bar
to make it work, but that was no problem.
Light is bright. Thank you.
748587
The reason so many are complaining about the light pattern is that this is a car bulb, not a motorcycle bulb. A motorcycle bulb needs to have an LED on two surfaces, 180 degrees apart. This bulb will on light up half of the headlight on most bikes.
4602231
this is a very bright light with simple operation.  it seems to meet the advertised run times with the tenergy rechargeable 18650s.  I use it for biking at night and attach it with one of the two fish mounts.  Its a bit giggly on rough roads and the beam is tighter then I'd like for a bike light but i still feel that it out performs dedicated bike lights of the same or higher price and i can carry some spare CR123's in my saddle bag.  most of the time the low mode will do for around town but if you want to ride fast when there isn't a lot of ambient light you'll need the high mode.  you won't be disappointed with this light but the LED field is moving fast so shop around.  you still might find something even better.
1282661
This is a good bike light in terms of brightness and side visibility.

Complaints: it needs a better flashing pattern or patterns.

Also, note that this is probably bright enough for (as the name says) urban commuting where there are some streetlights, etc, but it is IMO not bright enough for biking a dark trail.
2888971
I got to say! This bike light is the best bike light I've owned. I ride in a bike trail and at nights I don't have to worry about going over potholes or sticks. The light will be  brighter than your future!