Available on AMAZON 

The NiteRider TL 5.0 SL tail light. Long name, simple light. It’s got a few flashy settings to make sure you are visible to vehicles. I got it to replace my 20 year old tail light that finally disintegrated. Here it is, fresh out of the box. I’m going to use it first for running in the pre-dawn darkness on the highways and rec paths of Utah County.

NiteRider TL 5.0 SL Tail Light Video Introduction

[youtube https://youtu.be/ZSEUznbbSwE&w=640&h=360&rel=0]