Extra Lights on a New Jersey Vehicle: 300 Candlepower, 75 Feet, No Flashing

Start with the brightness threshold, because everything turns on it. R.S. 39:3-54(a) singles out any lighted lamp or illuminating device on a motor vehicle "other than a headlamp, spot lamp, or auxiliary driving lamp which projects a beam of light of an intensity greater than 300 candlepower" and requires it to be directed so that no part of the beam strikes the level of the roadway on which the vehicle stands more than 75 feet away. In plain terms, a bright pod, ditch light, bumper bar or work lamp must be pointed down and short. Three hundred candlepower is a low bar by modern LED standards, so most aftermarket auxiliary lighting sold today is inside this rule rather than outside it.

The count comes from R.S. 39:3-56. At least two lighted driving lamps must be displayed when lighted lamps are required, one on each side of the front. Then, "whenever a motor vehicle equipped with headlamps as in this article required is also equipped with auxiliary lamps or a spot lamp or any other lamp on the front thereof projecting a beam of an intensity greater than 300 candlepower, not more than a total of 4 of any such lamps on the front of a vehicle shall be lighted at any one time when upon a highway." Two low beams and a pair of driving lights already reach the ceiling. A six-pod bar wired to come on with the headlights does not.

Flashing is the part drivers get wrong most often. R.S. 39:3-54(a) prohibits flashing lights on motor vehicles, motorcycles and motor-drawn vehicles except as a means of indicating a right or left turn, with one carve-out: lamps warning other drivers of a vehicular traffic hazard. Those hazard lamps must be of a type approved by the Chief Administrator of the New Jersey Motor Vehicle Commission, mounted at the same level and as widely spaced laterally as practicable. Forward-facing ones must flash white or amber or any shade between; rearward-facing ones must flash amber or red or any shade between; and they must be visible at not less than 500 feet whenever lighted lamps are required. Subsection b. lets an omnibus carry two MVC-approved flashing red devices, one front and one rear, shining on the roadway underneath, to signal an emergency inside the bus.

Blue belongs to volunteers, not to the public. R.S. 39:3-54.7 lets an active member in good standing of a volunteer fire company, a volunteer first aid or rescue squad recognised by a municipality, or a county or municipal Office of Emergency Management whose official duties include responding to fire or emergency calls, mount and operate emergency warning lights on a vehicle that member drives, and it bars the Chief Administrator from making the member name which vehicles. R.S. 39:3-54.9 fixes the hardware: flashing or revolving, blue lens, switched from inside the vehicle, or a blue light bar, to the Chief Administrator's specifications. R.S. 39:3-54.10 allows no more than two, and dictates placement. One light goes in the centre of the roof, or on the front no higher than the top of the headlights, or in the centre of the dashboard; two go on the windshield columns where spotlights normally sit, or either side of the roof directly behind the top of the windshield. One on the roof and one on a windshield column is expressly forbidden, and light elements must be shielded from the driver's direct sight.

Red is narrower still. Under L.1985, c.171, only the chief or first assistant chief of a volunteer fire company may run red emergency warning lights on a private vehicle. R.S. 39:3-54.16 requires them to be mounted on the exterior, caps them at two, repeats the roof and windshield column placement rules, and permits operation "only while the vehicle is being used by the registered owner chief or first assistant chief in answering a fire or emergency call." R.S. 39:3-54.19 removes any illusion of privilege: the display grants no exemption from the traffic laws, the driver must proceed with due regard for everyone's safety, but other drivers must yield the right of way as they would to an authorized emergency vehicle under R.S. 39:4-92. A separate permit route exists for vehicles of licensed private detective businesses providing community security in a planned development. R.S. 39:3-54.14 lets the director issue a permit, countersigned by the municipality's chief law enforcement official, specifying the light type, display method and conditions of use, the colour of which "shall be other than red," for a $25 fee, with the permit carried by the operator whenever the light is displayed.

Green is New Jersey's newest colour. L.2025, c.209 added subsection c. to R.S. 39:3-54, allowing one or more green lights on a motor vehicle used for the removal or prevention of ice and snow that is owned and operated by the State, a bi-state or interstate agency or authority, or a local government unit, or contracted by the Department of Transportation for that use. The green light may only show while the vehicle is engaged in an operation presenting a traffic hazard, and only alongside the amber light required by subsection a. No additional Motor Vehicle Commission permit is needed.

Nothing on this list is screened by the annual inspection. N.J.S.A. 39:8-1(a), amended by L.2010, c.29, limits passenger automobile and noncommercial truck inspection to "emissions and emission-related items such as emission control equipment and on-board diagnostics." Lighting is enforced at the roadside by municipal police and the State Police.

S. S. A. 39:3-86 supplies one: for a violation of any provision of chapter three of Title 39 for which no specific penalty is provided, the offender is liable to not less than $25 and not more than $500, or imprisonment for a term not exceeding fifteen days, or both. The emergency warning light sections carry their own figures. S. 223 is liable to a penalty of not more than $100 and may have the privilege suspended or revoked by the Chief Administrator of the New Jersey Motor Vehicle Commission, while a person who is not authorized and willfully operates them is liable to a penalty of not more than $200.

S. 14(c) draws $50 for a first offense and $100 for a second and each subsequent offense. S. 16 tie lawful use to hardware approved to the Chief Administrator's specifications and to a specific responder role.