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Commercial vehicle lighting is both a safety issue and a compliance issue. For operators in Great Britain, the DVSA HGV inspection manual is a key practical source because it sets out the standards used during annual testing.

What operators should check

• Headlamps and alignment
• Front and rear position lamps
• Stop lamps and indicators
• Rear fog and reversing lamps
• End-outline and side marker lamps where required
• Reflectors and conspicuity markings

Vehicle age, dimensions and classification matter, so this guide should be used as a starting point rather than a substitute for the current legislation or DVSA manual.

Official sources: GOV.UK HGV inspection manual and the Road Vehicles Lighting Regulations 1989.

Conspicuity markings make the outline of heavy goods vehicles more visible at night by reflecting the headlights of following vehicles. Their placement and application are regulated.

TruckLighting.net recommends checking the latest Department for Transport and DVSA guidance before fitting or replacing markings. The official guidance explains the relevant vehicle categories and installation requirements.

LED lighting can offer long service life, lower power demand and compact packaging, but replacement decisions still need to consider compatibility, approval, beam pattern and legal requirements.

Questions before changing a lamp

• Is the lamp or light source approved and suitable for the vehicle?
• Will the replacement preserve the correct colour and intensity?
• Does the installation affect diagnostics or warning systems?
• Will alignment or visibility be altered?

A repeatable lighting check can help fleets identify faults before they become roadside or inspection problems.

1. Walk around the vehicle with lighting switched on.
2. Check dipped and main beam.
3. Check indicators and hazard lamps.
4. Check stop lamps with assistance or a suitable checking method.
5. Check position, marker, fog and reversing lamps.
6. Inspect lenses for damage, contamination and water ingress.
7. Check reflectors and conspicuity markings for damage or obstruction.
8. Record and rectify defects through the fleet maintenance process.

This checklist is general information and does not replace an operator’s required inspection or maintenance procedures.

Marker lamps help other road users understand a large vehicle’s size and position. Requirements depend on factors including vehicle dimensions, type and date of first use.

Because these details matter, TruckLighting.net will build this section around official DVSA and legislative sources rather than generic fitment advice.

Trailer lighting needs to be treated as part of the complete vehicle combination. Operators should routinely inspect connectors, wiring, lamps, reflectors and markings, paying particular attention to intermittent electrical faults and physical damage.

Work lights can improve visibility around loading, recovery and site operations, but more light is not automatically better. Position, glare, switching and road-use restrictions all need consideration.

Before installing auxiliary lighting, verify the rules applying to the vehicle and intended use.

Commercial vehicle lighting is increasingly connected with electronics, diagnostics and fleet data. Future systems may make it easier to detect failed light sources, record recurring faults and integrate lighting condition into preventive maintenance.

TruckLighting.net will track developments that have practical value for fleets rather than treating every new feature as a breakthrough.

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