I agree that high output rear lights should not be narrow laser beams but cover a wide range of angles as much as 270 degrees. This video from 4 years ago shows the taillights I use going away from the camera 1/4 mile. I use/used the 1 watt Turbo Superflash in falsh mode, an early Cytolite Hot Spot in swell and shrink mode, and my always on DIY lights. These latter units are about as bright as tail lights of my cars (I can't tell a difference at any rate). The forum crashed when I tried to insert the movie. I will see if the link will suffice:
[FONT=Verdana,Arial,Tahoma,Calibri,Geneva,sans-serif]https://www.youtube.com/watch?v=wc5DDb6qHbg&t=196s
I have had cops comment favorably and no longer have people tailgate me 3' off my rear fender.
[/FONT]