Cygolite Hypershot 350 & 250 Lumen Bicycle Taillight Models–7 Night & Daytime Modes–User Tunable Flash Speeds- Small & Durable–IP64 WaterResistant–Secure Hard Mount–USB Recharge–Great For Busy Streets

It is the brightest one that I could find. It is easy to adjust the light brightness and to change modes. The highest brightness may be too bright for nighttime use. But, it is excellent for daytime use. Which, is what I got it for. It seems secure. But, I feel like it needs a lanyard. I will eventually add one, in the best way that I can. It's too nice of a light to not have it on a lanyard. Just in case. / It was too low to connect it to the seat post on my bicycle. The back tire was higher than it. So, I purchased the under-seat attachment. But, it was barley high enough. I'd like more mounting options. Like, 90 degrees.

I bought the 150 lumen and the 350 lumen one. The 150 was plenty bright. This one was blindingly bright! I'm not sure I'd be safer. Sure, from 200 yards away they can see me better than with the 150, but from 50 feet away it might be too bright. I'll have to experiment with them. FYI I largely use them during the day as I try to avoid biking at night.I liked the fact that it came with two different mounts. It can also clip onto your belt or your rear pockets.

It's blindingly bright even in the day time you can see the light from 1/2 a mile , I had first seen this with a rider climbing up mt diablo and was impressed with its daytime performance so decided to give it a try.PROs:Many! to begin with its super super bright! @350 lumens!!!, it has a long lasting battery lasts my 100 miler without issues. Easy to mount and go , pretty good design suitable to mount on the seatpost not under the saddle like many a small ones out there. Also this is bright from the side profile and aptly right dimensions to be not too smallOnly CON is its not USB-C :(

The Hypershot 350 is one of the best flashers made for use during daylight hours. The worst case scenario for injury is when you are riding into a sun that's low to the horizon. The driver coming up on you is blinded by the sun.I've tested my Hypershot 350 by parking the bike on an east-west road near sunset and walking 250 feet behind it. The flasher was bright enough to be unmistakable in this situation but not by a wide margin. Less powerful flashers will be missed. So, this flasher with maximum available brightness is really the minimum requirement for safe daylight riding.The problem is that this flasher is much too powerful for use at night. Try the same test as above but at night. Looking directly at the flasher from 250 feet causes pain. Oncoming drivers will be blinded and provoked to road rage. Unfortunately, you can only adjust blink speed on the Hotshot, not brightness.I have a second and much less expensive flasher for use at night. It's the Blitzu [Amazon ASIN B00W7Y27CQ]. The Blitzu is amazingly competent relative to its cost. It's sold as a two-pack for around 15 USD. I didn't really want two of them, but I use both of them since they were received that way. In pulsing modes, there is a strobing effect between the two flashers that's gets attention. However, I can't recommend the Blitzu for use during the day.The Cygolite and the Blitzu are opposites in that the Hotshot is too bright for night and the Blitzu is not bright enough for day. It's ridiculous to need two flashers to cover the full 24 hours but there you are.The pricing on Cygolite products is very volatile. The Hotshot 350 is currently only 36 USD, which is less than the lower model Hotshot 250. It was 54 USD when I bought mine during April 2024.

Very bright, and lots of great settings that make it obvious that you are on the road. It will definitely let drivers know that if you hit them, you WILL win the lawsuit, no questionOnly one thing I'd change: make the mount a little more secure--as in, design the mount in such a way that the light takes a little more effort to remove. I flew off my speedy ebike a month ago, and the light flew off the mount as well..

I used this light for 7 days straight during an across state bike ride. The light is extremely bright and holds charge for hours! It performed well in rain, on gravel and pavement. Money well spent.

I ordered many types to decide which one is better. No one can beat this one ; it’s super, super bright.

This is one of the brightest rear tail lights out there. Expertly designed, too/ May take a minute to familiarize yourself with the various settings. It is extremely bright at night. On a recent group ride, i had several people tell me it was blinding them. Then they asked who makes it?I had to study the settings to find out how to make it dimmer. You can only do this in two modes: Steady and Buzz Flash. The L button controls on/off and switching between modes. The right button will dim or brighten the light in those two modes.It comes with two mounts, for seatpost and seatstay. You can also clip it to a bag. If you want to mount it to a rack, you need to buy the rack mount, which needs extra hardware to fit on a Blackburn MTB rack. There is also a saddle rail mount available. I usually clip it to my under-seat bag, but I could also clip it to my rack bag or a messenger bag or backpack. AFAIK, there's no real way to clip it to the back of a helmet, except for maybe an aftermarket strap.It has some proprietary tech that adjusts brightness to meet different lighting conditions, which gives it a variable run time in every mode. I have no idea how this actually works, but Cygolite mention it in their marketing materials. It will also remember the last setting when turned on, which is a nice feature.If and when sheer britness matters, this may be the king of shine. It certain;y gives confidence in night riding that you will be visible in traffic. Just remember to dial it down if going on a group ride.