yes strobe lights are legal so long as they are not used with flashing red /blue lights . Only emergency state vehicles are authorized to use such lighting for emergency use only. Personal vehicles can use or obtain strobe lighting only and can not be used with any other colored flashing lights.
If it's a state or county vehicle doing road repairs then flashing lights are to be on but should not be red - they should be amber and/or clear.Added: Red (or blue) flashing lights are reserved for use on authorized emergency response vehicles only (i.e.: police - fire/rescue - ambulance).
Blue
get bebuzz in the app world
Red and Blue lights are illegal in most if not all states since these are emergency vehicle light colors. Other then these two colors I don't find any law for Iowa regarding colors that are or are not allowed. There are exceptions that apply to flashing lights. Flashing yellow, amber, white, red and blue lights are for emergencies.
Blue
long as they are not flashing red and blue lights and they are soft and tubes can not be seen.
You can put blue film over your headlights but you can not change the lights to be blue. It is illegal. Only emergency vehicles can have blue or red lights.
Some states allow volunteer firefighters to do a variety of things to allow them to respond to an emergency. Flashing blue lights are typical. Sirens are unusual but might be allowed in some states.
The Bluelight is an emergency rescue service in the UK. It was launched in November 2004. It is used for the highest level of service of urgent matter. Flashing the blue light allows the emergency vehicle to disregard speed limits and stop signs.
A flashing red light on an emergency vehicle means stop. A flashing blue light means that the emergency vehicle is authorized to treat red traffic lights as being yellow, drive on an emergency use only lane on a highway, and disobey the speed limit.
Police and emergency only.