Weihao Bicycle Headlight, 10500 Lumens 7 LED Bike Light, Waterproof Mountain Bike Front Light Headlamp with 9600mAh Rechargeable Battery Pack, AC Charger

So first: The reason I'm now on my third one of these is because... of the batteries. The batteries are not sold separately (that I can find anyway) and by the end of the year, you'll be lucky to get 30 minutes out of them per charge. They just don't seem to be made with very good cells. Some of the One of the batteries lasted a little bit longer than the previous but after about a year, yeah. The performance was still not great. Maybe 40-50 minutes on the lowest brightness.Which is the other thing: I really don't think these are 10,500 lumens, as I have an actual, "pro-grade" (expensive) flashlight that's "certified" 10,000 lumens and it's WAY brighter than this one... that being said though, this is still PLENTY bright for a bicycle. Actually it's the brightest one I've found out of the 8 I've tried (the 7 LED one anyway). That's why I keep buying them. I know it's not ideal to buy a new light every year but I just can't seem to find any that light the dark trails like this one does (and has better batteries).In my experience, a lot of these bicycle lights seem to die after about a year. Then again, I am basically using these every day. So maybe it's not really that bad.My only wish is that they would sell the batteries separately so I could JUST buy the battery when one dies instead of stacking up extra lights as well. Actually if anyone has any advice on that, feel free to comment. I'm still searching :)

We were doing quite a bit of night riding, and had some close calls. I am not sure, but I have a good idea that the lights we were using had a highly focused beam that really reached out there, but was not so bright when seen from a few degrees off the tight beam. We had some VERY expensive top brand name lights that we could use night riding on trails and roads up in the mountains when we were camping. Wiggle the handlebars and the light waved all over the place. The bikes were stolen, along, of course with hundreds of dollars worth of lights.Well, we bought these. I knew that several people complain that the lumens thing has been misrepresented. So let me address that matter. One of our occasional rides is the Hiawatha Trail over the mountains on the old Milwaukee train route,(along side Interstate 90 near the Montana/Idaho border) with lots of tunnels. The longest one is the first one. It is listed as 1.7 miles long, and of course is quite high to allow for the tall trains the Milwaukee Railroad used, and then the electric cables that powered the electric locomotives. The problem is even with those very expensive lights, we had a terrible time in the tunnels. Those dark walls and high ceilings just sucked the light out of that narrow beam. It was a nightmare for us, trying to get through there.Well, last night we took the ride again, this time, the once a month midnight full moon ride, about sixteen miles and something like ten tunnels.We got in that first tunnel and we literally were flabbergasted. We lit up the whole tunnel. I mean REALLY lit up the tunnel. We had full detail, ceilings, walls, ground and where the mud puddles were. The one annoying thing was other riders trying to crowd ahead of us so they could get a full look at the tunnel.These lights are amazingly bright. You will see. You will be seen. And we were not using the bright setting. Oh, and the organizers had asked all of us to have our lights pointed down low so we truly could see the ground. We had done that. With regular lights, it is easy to not see the walls, and the water gutters on each side. We have had some close calls on that matter in the past. NOT LAST NIGHT! When they advertise that these lights are super bright, they are counting the lumens of the whole area the bike lights illuminate. No more narrow path. We can SEE where we are going.

Love it is nice and bright and long run time even on hi

In 40 years I've done a bit of riding - like over 3,200 logged night hours.  I've been through a lot of lights and batteries.  I needed some replacement batteries and y bike light supplier, Dinotte Lighting was proving hard to reach.Lights like this take advantage of Asian economics. A basic "pro" bike light from a USA manufacturer generally starts at $250 and this one from Welhao is just $34.  It's hard for a USA based manufacturer to compete even though the USA product is built well and most importantly actually delivers the lumens promised in the advertising..A "pro" bicycle light maintains it's rated brightness till the battery is essentially drained.  The beam pattern and color temperature are nicely balanced.   All my lights from Dinotte performed to their specs.Positives for this light. It's metal, nicely finished, simple attachment option. Just three operational settings; bright, low, flash.Negatives: It's not 10500 lumens as promised in the specs.  My best estimation its a tenth that number. Perhaps closer to 1,000 lumens. It will perform like a bicycle "pro" light but not output at 10500 lumens. There's one too many zero's in that headline.It's focus is a center hot spot with limited spill.  A bike light should concentrate light output into the center as it spills on the road. With this light it's too concentrated. The lens functions but is poorly calibrated. Color temp on the light is a bit too far toward the cold side.Regarding the battery.  I like the idea of six 18650 cells.  These are standard 18650 cells - not premium. My Dinotte batteries were only 4 cells but they were premium "protected" cells.  Dinotte built a premium batter that they sold for $90.   Dinotte adaptor's and mounting accessories were outstanding as well.The Weihao battery is compact and shrink wrapped package.  I don't know if it has any protection. .   In theory six cells are better than 4 battery cells with a high drain light head.  The battery connector cable is pretty thin and could cause a problem with a brighter 2,000 or 3,000 lumen light. To sum up.  It's a decent 1,000 lumen bicycle light with what looks like an OK battery.   I bought the light because I need to replace a couple of batteries for my Dinotte lights. After considering things I will likely return things as I want a more premium setup.