I have an amber FS vista lightbar full size with 4 flashers 2 amber in front and 2 in the back one red an one amber i use it for picking up scrap metal and towing car's to junk yard the cops never side any thing to me yet iv seen tow trucks do it then i did it the putnam co. sheriffs seen it the state police and westchester co. police seen it so point is i don't see it as a problem with having red light's face the rear of your car,truck,van etc....