"WOW!"I have caught myself saying "wow" to myself at least THREE separate times now since purchasing this headlight last July. Let me explain.1.) The first "wow" came when the light arrived. After charging the battery per manufacturer's recommendations, I plugged it in and tested it out in my living room - it felt like a car had pulled into my house!! Unbelievably bright for such a small light. Yes, the external battery pack is a bit clunky (I would have preferred it all to be one unit), but now that I see the light output, I can see why it needs a dedicated battery. This thing is BRIGHT!!! I bike to work every day (as well as biking to run errands around town), and cars *consistently* hesitate to pull out in front of me - I think most of them think I am a motorcycle at first glance, due to the surprisingly bright light. For $40, I consider this a great value.Over the past 6 months, I have biked in cold weather (down to the teens in degF), hot weather, pouring rain, driving wind, heavy fog, you name it - this light has handled it all like a champ. I always use the high setting (to be ultra conservative), and I've never had any trouble seeing what's in front of me on the road or feeling like others can see me. Compared to the old "two AA's" puny headlight I used to have, this thing provides WAY more light and makes me feel much safer. I love it.2.) The second "wow" came when I first emailed customer support. Unfortunately, I was hit by a truck *the day before* this light arrived in the mail (if only I had bought it sooner! Might have helped prevent the accident, who knows). Thus I didn't get around to really using it until 4 months later, after Thanksgiving, once I healed from the wreck. At that time, I saw that a new battery holder had been developed, so I emailed Don asking if there was any way I could get the new one. He emailed me back 17 minutes later confirming that he would ship me a new battery holder that very day - for free! Sure enough, it arrived promptly and was an improvement over the previous version. Wow!3.) The third "wow" came today, and is what prompted me to finally write this review. I have been using this light daily since Thanksgiving (so right at 6 months), and have been VERY happy with it. The only disappointment is that sometimes the battery would die sooner than I expected (i.e., after about 1.5 hours on high versus the advertised 3 hours). I charge the battery religiously every night when I park my bike, so I was certain that the battery was dying prematurely (I wasn't just forgetting to charge it). I emailed Don about it and he emailed me back 16 MINUTES LATER apologizing for the inconvenience, promising to send me a brand new battery for free right away (said I can keep the old one as a backup), and clarifying a few details about the battery performance. He pointed out that all of their advertising is careful to list the battery life as "up to" 3 hours, since there is some variation in battery manufacturing; anything from 2 to 3 hours on high is normal. But since mine was lasting less than 2 hours, it was considered a defect and covered by the 1-year warranty. Keep in mind that this is after 6 months of daily use, so who knows whether the battery decrease is really a defect or just normal wear and tear. Either way, Don didn't hesitate to send me a new one for free - all I had to do was send him one email asking nicely! :)Now, I realize that with such a glowing review, you may wonder about my motives. For the record, I paid full price for this light (after doing much research) and have not received any compensation beyond the replacement parts that I described above (and access to a really great headlight!). My only motivation for writing this is out of gratitude for the excellent product and excellent customer service provided by Don. I tend to be someone who reads lots of reviews but never takes the time to write them; Don has gone out of his way to earn a positive review from me, so here it is. :)While I'm writing, let me also mention that the red blinky taillight that comes with this headlight is also very good (I use it as my primary taillight). It uses *two* CR 2032 Lithium 3V coin batteries stacked on top of each other. To replace these batteries, you just wrangle the white plastic LED housing out of the red silicone band, and then pop off the back plastic cap (doesn't require any tools, just a fingernail). Replace the two batteries, then put everything back together. Very easy. In my experience, the blinky light gets dim after a couple months of consistent use, so I replace the batteries every month or two to keep them bright.One final note: at first I had trouble with the headlight slipping down when I went over bumps. At Don's suggestion, I wrapped some electrical tape around the handlebars and turned the last strip over (so the sticky side faced outward), then reattached the light. This has helped the light stay firmly in place for a few months now.TLDR: This light is awesome. The company is legit. Customer service is unparalleled. I'm a very happy customer. :) Thanks, Don!

WOW! I am definitely impressed with this light, as well as the FREE tail light it comes with. When I compared it side by side with the lights I already have, there literally is NO competition. Not even CLOSE! 1200 Lumens is almost embarrassingly bright; I feel like I will be offending people with this light lol that's how bright it is. My eyes still have those blinky things you get when you see flash from a camera. It has several settings too; my old light has only 2: constant and flash. This new light has like 5 different settings if you push and hold the power button for 3 seconds and then you can just push it once to get through each setting. It is also water proof, which is awesome. It also comes with a headband that you can attach the light to, if you like to ride that way, or if you like taking early-morning/late-night jogs or hikes. I have no idea how I'd wear it on my head since I have an afro lol, but I guess if I were wearing a hat, I could wear it around that. Be kind of weird to see an afro split into 4 sections from the band lol.I should also mention that if you ride vintage French (I ride a Peugeot Vitus 181 Course road bike, circa 1981) this light will fit your bike too (as you know, older Peugeot models before the mid-80s tend to have weird measurements). With my old light, I had to tweak it to make it fit. The back light will fit around my seat post as well, nice and snug with no issue, although I attach it to my panniers since I use those instead of my back pack much of the time. But it's nice to know since I did test it.It has an external battery pack, but it is completely necessary to get a light this bright in this price range. There are other lights out there that are probably this bright, but it won't be this inexpensive; you will be looking at around $100-$200 for one. I love that it's rechargeable, I love that it's easy to install and remove, and most importantly, I love that it's so bright that I don't feel I need to worry as much about whether other cars will see me or not. I feel very confident now. There are parts of the streets that I ride where there is no bike lane, and so I'm forced to ride along with traffic. This light makes me feel more comfortable doing that, coupled with the reflectors on my panniers as well as my reflector vest. I'm even more visible than before. But now, I can also see better too.If you are parking your bike outside for any reason, definitely remove this light and any other removable accessories that don't require tools. This one would definitely be a hot item that will go missing if you don't. As far as overnight storage, I store mine in my apartment, so no worries there. Consider doing so if you can.As for the back light, it is also very bright, you can remove the red silicone cover and the little white seal on the back if you ever end up needing to change out the battery, which it takes a clock type of battery. These can be found on Amazon as well as at your local Wal-Mart for cheap. Slide the red cover back on once you're done.I also decided to go ahead and grab the extra battery pack for $15.99, also here on Amazon. It's worth it if you want to make sure you're never out and tend to ride longer and don't want to come up short. This one will stay on for up to 6 hours on medium brightness, 3 hours on the brightest setting. So it's good to have.Anyway, I highly, HIGHLY recommend this light, if you ride at night, whether it's occasionally or on the regular, whether you ride on the streets or on dark trails. This light will get the job done and then some. Whenever I get a gas scooter, I plan to figure out away to put this one on it as well lol. The flash mode can also help with making street lights change faster too, there are some laggy street lights near my house and I always use the flash to make it change faster.Completely worth the money, you won't find a better one for this price. There are cheaper ones that claim to be like this light, but they are imitations, always better to buy straight from the source, spend the extra $10-$20 for something that works and is actually reliable.