This is the premium tail light on the market.

Features 2 1/2 Watt lights one on either side  as well as 2 more very bright leds in the middle. Thats more than 1 watt of brightness.

It comes with a solid seatpole bracket and can be mounted vertically or horizontally.

It also comes with a bracket so it can be mounted to your RACK or BASKET with ease It has a number of functions flash,steady, multi flash and disco.

Steady run time 55 hours and heaps longer on flash modes.

Also uses AA batteries so its easy to run your rechargables in it.

Such a powerfull light deserves more than tiny  AAA bateries