worth every penny IMO. I have 4 up front two in the windsheild and two in the brake lights. As for a 4 head system I would put them in the turn signals and the brake lights. Putting them in clear lenses is rough on the eyes after 10 hours of plowing because they are so bright, but if your just going to use them as warning lights on the side of the road then I would probably put them in the clear lenses like the reverse lights and the headlights.
97 F-350 PSD
6637, Rosewood Stage II's, DP-Tuner, modded 17*, ARP studs, 5" stacks and a bunch of other misc. stuff.
Clear and Red are reserved for fire/ems and LEO's. Thats the reason behind that law
IF you have an amber light permit and only in the front turn signals and back up lenses or if the rear turn signals are amber in color. Oh and here its blue and red not clear and only police can have anything in the headlights.