The trouble is not worth the expense. Besides, if your only lighting is on the front, then nobody else around you is aware of why you're driving as you are. Making for another dangerous situation. A single beacon, visible 360°, is all you should need, if it's just that. Needed. I, personally have no issue with vehicle lighting, provided you're only using it to be seen, while sitting on or along a highway. A Kojak light should be fine for that. If you need it for response, then it should be bolted to the vehicle. If it's magnetic, then it's not meant to be used while not stationary. I know they can be, and they are used that way, but DOT and Mfg. guidelines do state, they should not be used on moving vehicles; regardless of whether or not that is followed.