Blog

Welcome to the Dun-Bri Group Blog and Knowledgebase.

This is the help, support and knowledgebase site for Dun-Bri Group, the UK's only specialist and largest supplier of commercial and emergency vehicle lighting systems, Lite-wire and aftermarket parts.

We are international distributors of flashing beacons, lightbars, auto-electrical products, commercial spares, vehicle lamps and more.

Remember, you can contact us by telephone on +44 (0) 1763 274185, email us at sales@dun-bri.com, submit a question through our CONTACT US page or visit your local branch!

Parking lamps are covered by ECE Regulation 77. This applies whether an individual lamp, part of a headlamp or multi-functional lamp (such as rear cluster light). Where a pair of parking lamps are fitted, should one fail the other must be able to maintain the minimum light intensity as required.

E-Mark,ECE Regulation 77,Guides to ECE Regulations,Parking Lights,
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This regulation applies to side marker lights for motor vehicles (excluding motorcycles) and their trailers, whether it is for a stand-alone lamp, or as part of a multi-function light. Their primary function is to be used to indicate the presence of the vehicle when view from its side. For front and rear marker lights, see ECE Regulation 7.

E-Mark,ECE Regulation 91,Guides to ECE Regulations,Side Marker Lights,
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While this regulation applies to the technical requirements of vehicle conspicuity tapes, also known as contour tapes, and their performance – it does not mandate their use, and how to use them.

Conspicuity Tape,Contour Tape,E-Mark,ECE Regulation 104,Guides to ECE Regulations,RLVR,Road Vehicle Lighting Regulations,Tanker Tape,
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Fuses and circuit breakers are designed to interrupt the power to a circuit when the current flow exceeds safe levels. For example, if your toaster shorts out, a fuse or breaker should “trip”, protecting the wiring in the walls from melting. As such, fuses and breakers are primarily intended to protect the wiring — UL or CSA approval supposedly indicates that the equipment itself won’t cause a fire.

Carling Technologies,Circuit Breakers, Fuses,
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The IP rating, or International Protection Marking as it technically known is part of the IEC standard 60529. It is sometimes interpreted as Ingress Protection Marking, but its job is to classify and rate the degree of protection provided against intrusion (body parts such as hands and fingers), dust, accidental contact, and water by mechanical casings and electrical enclosures. It is published by the International Electrotechnical Commission (IEC). The equivalent British standard is EN 60529.

IP Ratings,Water-proofing
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When looking at D2 xenon HID bulbs, it can be tricky to determine which bulb you need. A frequently asked question in our Sales Office is, ‘do I need a D2S, D2C, or D2R?’…

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Nowadays, most people often want to source PIR activated LED interior lighting or LED sensors to integrate it into an existing circuit when buying from Dun-Bri. This article aims to give you a greater understanding of what PIR means, and what it actually is…

So, what does

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To help you identify the most commonly fitted bulbs in cars, vans, motorcycles, trucks, buses and other plant and agricultural machinery, you can now download the Vehicle Bulb identification sheets. For more help and advice, please call us on 01763 274185 or email

Bulbs,Car Lighting,Catalogue,Cheat Sheet,Commercial Vehicle Lighting,Dun-Bri Group,Headlights,LED Lighting,Motorcycle Lighting,Neolux,Osram,Philips,Truck Lighting,Valueline,Van Lighting,
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To make full use of the online shopping and features on our websites, your computer, tablet or mobile phone will need to accept cookies, as we can only provide you with certain personalised features of this website by using them.

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For trade customers, you can now download the Trade Account Application Form. You can return it to us by email at

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