Rear lights

Has anyone added lights like these to the rear of the shell, like 2 on each side around the back window for extra reverse lighting or just on a separate switch for extra light? Lights would be mounted vertically on each side.

 

rock lights aren't going to be bright enough or project far enough to be useful as reverse lights. Even the high dollar brands are designed to be a roughly a foot off the ground and project a very wide light to illuminate the ground.
For reverse lights, you just need brighter (and more directional) lights