NiteRider

I would like to give this light 5 stars like everyone else, but the mount strap is too short. I was able to stretch the strap and get it to hook into the first hole; but it is too tight and I expect it to break sooner rather than later.

Also, the the base of the strap which attaches the strap to the light is curved on the inside, and the back of Specialized seatpost is flat.

I cannot recommend this light for Specialized road bikes.

Have NR 1000 light on bike, bought second NR Lumina Micro 900 to mount on helmet for nighttime Fat Biking in Alaska, its nice to see moose before you get stomped. Have been impressed with battery life even at extremely cold temperatures. Blinking feature is nice for extra visibility along roads in the daylight.

This light is so powerful during the day. My initial buy was the Exposure MK3, but I read plenty of reviews on it and decided to pass. My second was the Cygolite hypershot. But read too many mix reviews on the durability of it. I decided to go with niteride because many ppl recommended the brand to me on Reddit for long cycling rides during the day. I needed a rear light that would last 6-9hrs. This thing is extremely powerful and also battery is very efficient depending on what setting you have it.

I take fast and long rides on an E bike. Urban and suburban intercity riding.

I've used Lumina lights for years. They're pretty much indestructible, but lacking in some features for street use.

This one has those missing features.

1- A wide beam that lights up a whole traffic lane.

2- Side marker light feature. Reflectors don't work in the dark, lights do.

3- A fluted lens so oncoming traffic isn't looking directly into the bright LED.

4- A fast day strobe setting. A slow strobe makes traffic think you're moving slow. Faster is much better for fast riding.

5- Easily removed from the bike. if you don't take it with you, somebody else will. A little bit chunky in the pockets.

Quality ,performance, and features are all there. NR Luminas have never been cheap. Even at a discount this is a pricey light. For daytime rides I take a smaller Lumina. The really old ones have an even faster strobe. But for night rides this is hard to beat. FWIW I have Luminas over 10 years old that still work.