I've got my preemption strobe on my dash all by itself (not running just that, but no other lights next to it). I'm finding that it really catches people's attention that way, as well as triggers the sensors just fine. Do you HAVE to have yours behind a colored lens - is it going in a lightbar or something?
Right now this certain ambulance has the dash light model since it was an all LED truck. However we are having huge issues with the light not getting the sensor until we are almost clearing the intersection our selfs. Today it didn't hit it until I was almost directly under it. The light is aimed good, all the other trucks have the center strobe as the "light changing strobe." The reason I'm asking about a colored lense is taking a halogen light and putting a HAW bulb in it. This way i can retain the light as a working lighthead when the preemption strobe is off.