The Specialized Flux Expert Tail Light:
Specialized Bicycle Components

- 110 lumen output
- Visible up to 0.6mile / 1.0 kilometer even during midday in the Summer
- Ambient light sensor boosts light output by 50% in Flash Mode during daytime running for increased visibility

One problem I had with an older Dinotte tail light was that it was good for daylight but bad for night riding with other riders, even it's lowest setting was to bright. A rear light with an ambient light sensor that auto adjusts sounds useful for not having to own multiple rear lights for different lighting.