Cygolite Dice HL– 150 Lumen Bike Light– 6 Night & 2 Daytime Modes– Ultra Compact Design– IP64 Water Resistant– Sturdy Flexible Mount– USB Rechargeable Headlight - for Aero Road & Commuter Bicycles

PROS:Tiny, but sufficiently powerful to catch people’s attention during daylight on bright, sunny days.Ten hours of run time for the brightest daylight blinking mode.Waterproof. Build quality is excellent.Performance to price is superb. Cygolites in general perform as well as or outperform some of the most expensive and premium cycling lights on the market.Cygolite customer service is outstanding. Plus, if/when you need to change the battery on this light, it’s possible to return it to Cygolite and have the battery replaced, unlike many other cycling related electronic components which are basically disposable once the battery dies.CONS:Uses Micro USB charging cable rather than USB C.

Small, effective light for day/evening riding. the flashing (strobe) is great as a suplement for night riding. and as a stand alone lamp for daytime riding. For the $ this lamp is hard to beat. it is not a $100 light. It is a $25 light. I decided this was a great buy and served my purpose just fine. I would buy this again.

This light is super bright. It is easy to use. Rechargeable using micro-USB. Small, so no added bulk to handlebars. The quirk is that the blinking pattern is different in day vs. night. The light has some kind of sensor in it. During the day it is a single flash every second or so (which is what I wanted). When I first got it and tested it indoors, it flashed multiple times with a short break between multiple-flash sequences. I was ready to return it, then I used it on a ride and noticed the difference. It even thinks it is nighttime if I turn it on in my garage while getting the bike out.

I’m using this light on my road bike as a daytime strobe for better visibility. It works great for this purpose.Size and mounting: super small. I like that is down and out of the way on the front of the bars. The small size makes it very easy to mount on the bars. The rubber strap is secure and the lights doesn’t vibrate, make noise, or move during a ride.Battery life: My rides average 2-3 hours and it lasts the whole ride.Output: at 150 lumens I wouldn’t use this for mtb or on unlit streets. As a daytime light it’s great.Settings: the different settings are good. I like having variety.Charging: it doesn’t take long to charge and I love that it’s usb charging. I do not like that the main lamp blinks as a charge indicator. It’s annoying and distracting if it’s connected to a computer or at your desk.Overall I love this light even with the annoying blinking charge indicator. For the price and it’s size it was better than any other usb charging option.

When I ride in the dark, I use 3 lights. 2 headlights and this little gem. I use it as the blinking light. I use it in the daytime too. I have used the solid beam as well after the other lights have died. It seems expensive, till you burn through a few of the cheaper ones. I have 2 of these and they simply work.

Light would not turn on.

I have been using this now for about 6 months and 600 miles on my bike. It has worked very well. Don't let the small size fool you as it flashes bright and the battery lasts a long time before needing recharging. Mounting is easy and secure. This light is really for safety as in my opinion it is not bright enough for night riding. As a result, I only use it in flashing mode. But I knew that when I bought it. Overall I am very pleased.On my bike control cables were in the way and prevented good forward visibility but that was remedied by 3D printing an auxiliary mount which raised it a little.

The light was fairly bright for such a small unit. Putting the mount on is simple - merely a stretchy rubber strap. But attaching the light (and removing it for charging) is not easy. After a few months of use, the light disappeared - I assume because it fell off during a ride. Gone now! I'll throw the remaining strap away.