(A) Whenever a motor vehicle equipped with headlights is also equipped with any auxiliary lights or spotlight or any other light on the front thereof projecting a beam of an intensity greater than 300 candlepower, not more than a total of five of any such lights on the front of a vehicle shall be lighted at any one time when the vehicle is upon a highway.
(B) Any lighted light or illuminating device upon a motor vehicle, other than headlights, spotlights, signal lights, or auxiliary driving lights, that projects a beam of light of an intensity greater than 300 candlepower shall be so directed that no part of the beam will strike the level of the roadway on which the vehicle stands at a distance of more than 75 feet from the vehicle.
(C) (1) Flashing lights are prohibited on motor vehicles, except as a means for indicating a right or a left turn, or in the presence of a vehicular traffic hazard requiring unusual care in approaching, or overtaking or passing.
(2) The prohibition in division (C)(1) of this section does not apply to any of the following:
(a) Emergency vehicles, road service vehicles servicing or towing a disabled vehicle, stationary waste collection vehicles actively collecting garbage, refuse, trash, or recyclable materials on the roadside, rural mail delivery vehicles, vehicles as provided in R.C. § 4513.182, highway maintenance vehicles, and similar equipment operated by state or local authorities, provided such vehicles are equipped with and display, when used on a street or highway for the special purpose necessitating such lights, a flashing, oscillating, or rotating amber light;
(b) Vehicles or machinery permitted by R.C. § 4513.111 to have a flashing red light;
(c) Farm machinery and vehicles escorting farm machinery, provided such machinery and vehicles are equipped with and display, when used on a street or highway, a flashing, oscillating, or rotating amber light. Farm machinery also may display the lights described in R.C. § 4513.111.
(d) A funeral hearse or funeral escort vehicle, provided that the funeral hearse or funeral escort vehicle is equipped with and displays, when used on a street or highway for the special purpose necessitating such lights, a flashing, oscillating, or rotating purple or amber light.
(e) A vehicle being used for emergency preparedness, response, and recovery activities, as those terms are defined in R.C. § 5502.21, that is equipped with and displays, when used on a street or highway for the special purpose necessitating such lights, a flashing, oscillating, or rotating amber or red and white light, provided that the vehicle is being operated by a person from one of the following and the vehicle is clearly marked with the applicable agency's or authority's insignia:
1. The Ohio Emergency Management Agency;
2. A countywide emergency management agency established under R.C. § 5502.26;
3. A regional authority for emergency management established under R.C. § 5502.27;
4. A program for emergency management established under R.C. § 5502.271.
(3) Division (C)(1) of this section does not apply to animal-drawn vehicles subject to R.C. § 4513.114.
(D) (1) Except a person operating a public safety vehicle, as defined in R.C. § 4511.01(E), an emergency management agency vehicle, as described in division (C)(2)(e) of this section, or a school bus, no person shall operate, move, or park upon, or permit to stand within the right-of-way of any public street or highway any vehicle or equipment that is equipped with and displaying a flashing red or a flashing combination red and white light, or an oscillating or rotating red light, or a combination red and white oscillating or rotating light.
(2) Except a public law enforcement officer, or other person sworn to enforce the criminal and traffic laws of the state, operating a public safety vehicle when on duty, no person shall operate, move, or park upon, or permit to stand within the right-of-way of any street or highway any vehicle or equipment that is equipped with, or upon which is mounted, and displaying a flashing blue or a flashing combination blue and white light, or an oscillating or rotating blue light, or a combination blue and white oscillating or rotating light.
(E) This section does not prohibit the use of warning lights required by law or the simultaneous flashing of turn signals on disabled vehicles or on vehicles being operated in unfavorable atmospheric conditions in order to enhance their visibility. This section also does not prohibit the simultaneous flashing of turn signals or warning lights whether on farm machinery or vehicles escorting farm machinery when used on a street or highway.
(R.C. § 4513.17)
(F) (1) Notwithstanding any other provision of law, a motor vehicle operated by a coroner, deputy coroner or coroner’s investigator may be equipped with a flashing, oscillating or rotating red or blue light and siren, whistle or bell capable of emitting sound audible under normal conditions from a distance of not less than 500 feet. Such a vehicle may display the flashing, oscillating or rotating red or blue light and may give the audible signal of the siren, whistle or bell only when responding to a fatality or a fatal motor vehicle accident on a street or highway and only at those locations where the stoppage of traffic impedes the ability of the coroner, deputy coroner or coroner’s investigator to arrive at the site of the fatality.
(2) This division (F) does not relieve the coroner, deputy coroner or coroner’s investigator operating a motor vehicle from the duty to drive with due regard for the safety of all persons and property upon the highway.
(R.C. § 4513.171)
(G) Whoever violates this section is guilty of a minor misdemeanor.
(R.C. §§ 4513.17(F), 4513.171(B))