Work Lights vs Driving Lights vs Fog Lights: The Differences in NZ
In this guide
- Work Lights vs Driving Lights vs Fog Lights: Comparison Table
- What Work Lights Are For
- What Driving Lights Are For
- What Fog Lights Are For
- Can I Use Work Lights on the Road?
- Spot vs Flood Work Lights
- Why Work Lights Cannot Replace Driving or Fog Lights
- Wiring Rules for Each Type
- Which Light Do You Need?
- Frequently asked questions
Work lights light a working area around a vehicle and must be switched off before you go on the public road. Driving lights are extra main-beam lamps that reach far down the road and must switch off when you dip. Fog lights throw a wide, low beam under fog and, in New Zealand, should only be used when fog, snow or similar conditions cut visibility. Only driving and fog lamps carry road approval.
The 3 types can look alike on a bracket, which is why they get mixed up. They differ in what they are for, the shape of the beam, the approval they carry, how they must be wired, and when you are allowed to switch them on. This guide sets out those differences under New Zealand rules, answers whether you can use work lights on the road, and explains spot and flood beams along the way.
Work Lights vs Driving Lights vs Fog Lights: Comparison Table
| Feature | Work lights | Driving lights | Front fog lights |
|---|---|---|---|
| Purpose | Light a working area, the implement, the loader or the yard | Add reach to the headlamp main beam on open roads at night | Light the road close ahead in dense fog or falling snow |
| Beam | Flood, wide flood, spot or combo; no cut-off | Long-range, fairly narrow; no cut-off | Wide and low with a sharp, flat top cut-off |
| Road approval | None for lighting the road. LED types should carry UNECE R10 (EMC) | Approved as a main-beam lamp (UNECE R112, R113 or R98, now brought together in R149) | Approved as a front fog lamp (UNECE R19, now in R149) |
| Legal on the road? | No. Switch off before using the public road | Yes, with main beam, when no one will be dazzled | Yes, only in dense fog or falling snow |
| Wiring rule | Own switch and relay, separate from road lighting | Must switch off when headlamps are dipped | Own switch, independent of the headlamps |
| NZ rule | Land Transport Rule: Vehicle Lighting 2004; NZTA guidance | Land Transport Rule: Vehicle Lighting 2004 (dazzle); NZ Road Code | NZ Road Code; Land Transport Rule: Vehicle Lighting 2004 |
What Work Lights Are For
A work light, or work lamp, is a lamp used to light a working area. Older rules and manuals often call them ploughing lamps, and New Zealand’s vehicle lighting rules refer to work lamps.
On a tractor that means lighting the field around the machine, the implement behind it, the loader bucket, the hitch, or the yard. Work lights are designed to put a lot of light close to the vehicle. They have no cut-off line to protect other road users, which is exactly why they are not approved for lighting the road.
Work lights come in 4 main beam patterns:
- Flood: a broad beam that lights a wide area at short to medium range.
- Wide flood: an even wider, shorter beam for close work, hitching and reversing.
- Spot: a narrow, intense beam that reaches further but lights only a strip.
- Combo: a spot centre with flood light either side, for mixed jobs.
An E-mark on an LED work light usually means it has EMC approval under UNECE Regulation 10, so it should not interfere with radios and electronics. It does not make the work light a road-legal headlamp or driving lamp.
What Driving Lights Are For
A driving light, or driving lamp, is an additional main-beam headlamp. It adds reach and intensity to your headlamp main beam when driving on unlit roads with no other traffic about. Because it is a main-beam lamp, it carries main-beam approval and must follow the same rules as your headlamps on full beam.
The key wiring rule is that a main-beam lamp must be capable of being switched off by a device that at the same time switches on a dipped beam, and optional main-beam lamps are treated the same way. In practice, driving lamps are wired through a relay triggered from the headlamp main-beam circuit, so they go off the moment you dip. New Zealand’s vehicle lighting rules also ban any lamp that can dazzle or confuse other road users, so driving lamps must never be left on with oncoming traffic about.
Driving lamps can be spot or a slightly wider “pencil” or “driving” beam, but they are always aimed for distance. Our guides to driving and spot lamps and driving lights vs headlights go into beam types and approvals.
What Fog Lights Are For
A front fog lamp is a lamp used to improve the illumination of the road in front of a vehicle in fog or falling snow. Its beam is wide and low, with a sharp, flat top edge so the light stays under the fog rather than bouncing back into the driver’s eyes. In New Zealand front fog lamps are optional, but if fitted they must be white or selective yellow and must work, or the vehicle can fail its Warrant of Fitness (WoF) or Certificate of Fitness (CoF).
A rear fog lamp is different: it does not light the road at all. It makes the vehicle more visible from behind in poor visibility. It is red, bright, and must not come on with the brakes; it must also have a tell-tale so the driver knows it is on.
In New Zealand, fog lamps are for poor visibility such as fog or falling snow, and should be switched off once visibility improves so they do not dazzle other drivers. Check the NZ Road Code for the current wording, and see our guide on when to use fog lights.
Under the UNECE R48 installation rules that apply to type-approved vehicles, front fog lamps are switched independently of the headlamps, so you can use them with dipped beam and switch them off without touching the headlamps. In fog, use dipped headlights plus fog lamps, reduce speed and keep a safe following distance.
Can I Use Work Lights on the Road?
Not for driving. Work lamps are designed to light a working area, not the road, and New Zealand’s vehicle lighting rules say no lamp may dazzle or confuse other road users. White light shown to the rear while driving (other than reversing and number plate lamps) can look like an approaching vehicle, and powerful lamps can dazzle.
In New Zealand, plan on the basis that work lights go off when you are driving on the public road. Some practical answers:
| Situation | Work lights allowed? |
|---|---|
| Driving a tractor along a rural road at night between paddocks | No. Use dipped headlamps (and main beam when appropriate). |
| Using work lights to “see better” on an unlit local road | No. That is lighting the road with lamps that must be off. |
| Rear work lights on to light a trailer or slurry tanker while driving on the road | No. Rear white lights while driving can be mistaken for headlights and dazzle following drivers. |
| Working in a field, yard or on a farm road off the public road | Yes. Work lamps are fine on private land. |
| Working in a field next to a public road | Yes, but angle lamps away from the road so passing drivers are not dazzled. |
| Stopped on or beside the public road to hitch an implement or deal with a breakdown | Only to light the work area, aimed away from traffic, with hazard lights or the beacon on. Move off the road first if you can, and check current NZTA Waka Kotahi guidance if you do roadside work regularly. |
Fitting optional lighting is controlled by the vehicle lighting rules, so take care before fitting spot lights or other add-ons, get professional advice and tell your insurer.
The safest habit is simple: switch all work lights off before you pull out of the gate. A separate, clearly marked work light switch makes that easy to remember. The same reasoning applies to off-road LED light bars; on a public road in New Zealand they fall under the general rules on colour, dazzle and work lamps. See can you use LED light bars on public roads.
Spot vs Flood Work Lights
A spot work light concentrates its output into a narrow beam, roughly 10 to 30 degrees, that reaches a long way but lights only a narrow strip. A flood work light spreads its output across a wide beam, roughly 40 degrees and wider, that lights a broad area close to the machine.
- Choose flood for cab roof field lighting, rear implement work, hitching, reversing and yard jobs.
- Choose spot for reaching the end of a sprayer boom, a combine header edge or the far side of a wide implement.
- Choose combo for front and loader work where you want some reach and some spread.
A spot work light is still a work light. A narrow beam does not turn it into a driving lamp, and it is not approved for lighting the road.
Why Work Lights Cannot Replace Driving or Fog Lights
Road-approved lamps are tested against strict light patterns. A dipped headlamp and a fog lamp must keep light below a cut-off so oncoming drivers are not dazzled. A driving lamp is tested as a main-beam lamp and must switch off when you dip. Work lights are not tested for any of this. They are designed to put as much light as possible on a work area, which is exactly what makes them dangerous to other drivers on a road.
Some lamps carry dual functions, for example a combined work lamp and approved position or indicator lamp, or a lamp approved as a driving lamp that also suits off-road work. Check the approval markings on the lens. Only the approved function is legal on the road. New Zealand accepts UNECE “E” mark approval, alongside some other recognised standards such as SAE and the Australian Design Rules.
Wiring Rules for Each Type
Work Lights
Wire work lights on their own switch through a relay, separate from the road lighting circuits. An ignition-switched feed prevents them being left on with the key out.
Driving Lights
Wire driving lights through a relay triggered from the main-beam circuit, with an optional separate switch so you can choose whether they come on with main beam. They must switch off when the headlamps dip.
Front Fog Lights
Wire front fog lamps on their own switch, independent of the headlamps, so they can be used with dipped beam in fog and switched off separately.
Rear Fog Lights
Wire rear fog lamps through a switch with a warning light on the dashboard. They must not come on with the brake lamps.
Which Light Do You Need?
- Lighting the field, implement, loader or yard: work lights. Browse work lamps.
- More reach on unlit roads at night: approved driving lamps.
- Seeing the road edge in dense fog or falling snow: approved front fog lamps.
- Being seen from behind in fog: a rear fog lamp.
Driving lamps and fog lamps are both in our auxiliary lamps range. Check the approval marks on any lamp you intend to use on the road.
Frequently asked questions
Can I use work lights on the road in New Zealand?
Not for driving. Work lamps are for lighting a working area, and New Zealand’s vehicle lighting rules say no lamp may dazzle or confuse other road users. Switch them off before you drive on the public road, and never show white work lights to the rear while driving.
What is the difference between fog lights and work lights?
Fog lights are road-approved lamps with a wide, low beam and a sharp top cut-off, for use only in dense fog or falling snow. Work lights have no cut-off and no road approval, and are only for lighting a working area off the road. They cannot stand in for each other.
What is the difference between driving lights and work lights?
Driving lights are approved additional main-beam headlamps that extend road lighting at night and must switch off when you dip. Work lights light a working area around the vehicle and must be off on the public road. A spot work light is not a driving lamp, even with a similar beam.
Are spot work lights the same as driving lights?
No. A spot work light and a driving lamp can both throw a narrow, long-range beam, but only a driving lamp carries main-beam approval for road use and is wired to switch off when you dip. A spot work light is for off-road work only.
Do work lights need to be E-marked?
An E-mark on an LED work light usually shows UNECE R10 approval for electromagnetic compatibility, which reduces the risk of interference with radios, GPS and vehicle electronics. It is recommended for any work light fitted to a vehicle, but it does not make the lamp legal for lighting the road.
