Editor's Note: This article is part of RoadBikeReview and Mtbr's 2016 Bike Lights Shootout. See the RoadBikeReview Commuter Lights Index and the 2016 Mtbr Headlights Index.
The Lowdown: Lupine Rotlicht
It's really fascinating that some of the coolest technology is being poured into tail lights rather than headlights. Headlights just get brighter in an Arm's Race of sorts. But tail lights can become smarter by incorporating accelerometers, cameras, lasers and sensors all too keep the cyclist safe. After all, most cyclists are hit by motorists because they are not seen. So this is a very worthy endeavor
The Lupine Rotlicht is a 160 Lumen light with four different light modes are available: steady, flashing, wave pulse, and pulse. It has an accelerometer that allows it to function as a brake light. When you pull on the brakes and slow down significantly or come to a stop, the built in acceleration sensor turns the light brighter to gain more attention on the streets.
It is also light sensing and has automatic light adjustment depending on the ambient light. If for example a car comes closer, the light turns brighter, allowing the rider to become more visible.
What's cool about it
The Lupine Rotlicht gets brighter when the cyclist comes to a stop. It also gets brighter when there's more ambient light, like a car shining lights on it.