Cygolite Hotrod 120, 90, 50 Lumen Bicycle Tail Light Models- Night & Daytime Modes– Wide Glowing LEDs- Compact Sleek– IP64 Water Resistant– Sturdy Flexible Mount- USB Recharging–Great for Busy Roads

Very bright. It really demands attention from drivers. East to install. Easy to operate. The battery is good for many rides. Highly recommended.

I normally ride on city streets and being seen is very important for safety reasons. This light is very easy to install either on the seat post, seat stays, or back of seat. Attaching to your bicycle is very simple by means of the supplied elastic bands with the housing hooks being deep enough to ensure the light stays on. The light is slim and not one of those boxy/square light and this gives you a wider are with more LED lights and larger pattern. The light is very bright (even in bright sunshine) or it can be adjusted down by selecting a different flash or steady mode. The different modes and brightness settings, makes this light very versatile. The battery charge last quite a while and quite impressive since it can go for a couple of weeks without needing a charge (my rides are normally 1 - 1.5 hrs and I ride 4-5 times weekly). The light is easy to turn on and off and mode selection is simply done by pressing the on/off button. Once you select your desired mode, the mode is put into memory so that when you turn on your light again, it automatically comes on. Overall, I am very happy with this purchase and after several months of use, I have not experienced any issues whatsoever.

Extremely bright, multiple flashing patterns and very good battery life have to recharge about once a week with daily use

My original Cygolite got lost/stolen. The device is so light, bright,and quickly recharged that I wanted the same thing as a replacement. It is costly but worth it to me.

Not much to add to other reviews on the lights general features - it's bright, plenty of flashing options, etc. What I particularly like is the ease of turning it off. I've had lights that made you cycle through all the settings to get to "off". Annoying. This one requires just a short 1-2 second press on the single, easily reached, cycle on/off button to tun it off. I can do this pretty easily while riding. Perfect.What I like most is that it mounts on my aero Tarmac SL7 seat post and the light blends in nicely with the post once mounted. It does require stretching the attachment band to near its limit to get it on, but not so much that it looks over stretched when attached.The battery life is OK. It lasted through a ~3 hour ride just fine, but only made it through about half of a second ride. What I don't like is that it has to be removed from the bike to charge. While it fits my aero seat post, having to take if off every ride or 2 to charge just means I have to over stretch the attachment band all the time. It's just a matter of time before that band is likely to fail. It also means I can't charge the light and my Di system (a seat post charge port) conveniently at the same time without having to remove parts.

Very bright. Multiple modes for visibility and/or extended battery life. Battery life could be a bit better.

I had this for several months and it worked fine, Unfortunately I got caught out in the rain last week. I got wet, the bike got wet and the light got wet. I dried off. I clean and lubed the bike. The light now has a compete mind of its own. Sometimes it comes on when I push the button but most times it doesn't. Sometimes it just turns on by itself. Sometimes it just shuts off. I figure that water got into the light and is causing the issues. One would have thought that a light made for a bike would be created waterproof because anyone who rides has been caught out in it. In fact when it is raining, that is probably the most critical time for it to work. When drivers have limited visibility, you need to be seen. Sadly, this light fails.

Great battery life. Nice variety of flashing modes and steady light. Easy to attach and charge. Fits nicely on the seat stem. More than bright enough. Basically a perfect bike taillight.