(1) Emergency lights used on the following vehicles must emit a blue light or a combination of blue and white light: a police vehicle , except that a police vehicle may also use red emergency lights under paragraph F; a Department of Corrections vehicle as described in subsection 1, paragraph B, subparagraph (6); a vehicle operated by a chief of police, a sheriff or a deputy sheriff; and a vehicle operated by a qualified deputy sheriff or other qualified individual performing court security-related functions and services.

(2) Emergency lights used on an ambulance, an emergency medical service vehicle, a fire department vehicle or a hazardous material response vehicle may include one blue light mounted facing toward the rear of the vehicle so that the light is primarily visible to approaching traffic from the rear only.

(3) The taillight of a vehicle, or replica of a vehicle, manufactured prior to 1952 and registered under section 457, may contain a blue or purple insert of not more than one inch in diameter.

(4) Blue interior auxiliary lighting or dash lighting may be used on any vehicle if no portion of the beam of light is visible at a height of 42 inches above a surface parallel with the level surface on which the vehicle stands at a distance of 20 feet from any part of the vehicle.

(1) Emergency lights used on an ambulance, an emergency medical service vehicle, a fire department vehicle, a fire vehicle, a rescue vehicle or a hazardous material response vehicle must emit a red light or a combination of red and white light.

(2) The municipal officers or a municipal official designated by the municipal officers, with the approval of the fire chief, may authorize an active member of a municipal or volunteer fire department to use one red or combination red and white flashing auxiliary light mounted in the windshield or on the dashboard at the front of the vehicle or 2 flashing red or combination red and white auxiliary lights mounted on the front of the vehicle above the front bumper and below the hood and one red auxiliary light mounted in the rear window area. The light or lights may be displayed but may be used only while the member is en route to or at the scene of a fire or other emergency. A light mounted on the dashboard or in the windshield must be shielded so that the emitted light does not interfere with the operator's vision. The use of lights may be revoked at any time by the fire chief.

(3) Members of an emergency medical service licensed by Maine Emergency Medical Services may display and use on a vehicle red or combination red and white flashing auxiliary lights and red auxiliary lights of the same proportion, in the same location and under the same conditions as those permitted municipal and volunteer firefighters, when authorized by the chief official of the emergency medical service. The use of lights may be revoked at any time by the chief official of the emergency medical service.

(4) A police vehicle may be equipped with, display and use red emergency lights. The red emergency lights may comprise up to 50% of the emergency lights used on the police vehicle.