Street legality is a chain of conditions, not a sticker on the box
An LED retrofit bulb can support a road-use claim only when the exact product has a valid approval basis, the installation falls within the documented scope and the destination market recognizes that route. A bulb base such as H7, H11 or H4 does not settle the question. Neither does an E-mark unless the regulation and approved object are known.
The practical way to check legality is to work through four questions in order: Which product is this? What exactly is approved? Where may it be installed? In which market is that route valid?
Use this four-step check before accepting a road-use claim
- Identify the exact product. Record the commercial SKU, regulatory type and physical marking.
- Identify the approval object. Determine whether the evidence is for the light source, EMC, the headlamp assembly or a national application-specific route.
- Check the installation scope. Confirm the category, vehicle/headlamp application and any required accessories.
- Check the destination market. Verify that the intended country accepts the route and that the public claim does not exceed the documented conditions.
If one of those steps cannot be completed, the claim should stay conditional. Filling the gap with “ECE approved” or “street legal” does not make the evidence stronger.
R37, R10 and headlamp approvals do not prove the same thing
| Reference | What it covers | What it does not prove by itself |
|---|---|---|
| UN R37 | Defined replaceable light-source types within its scope, including applicable LED replacement categories | Universal legality in every country or approval of a different SKU |
| UN R10 | Electromagnetic compatibility | Optical approval of the retrofit light source |
| UN R112 / R149 | Headlamp or road-illumination device approval | Standalone approval of a separately sold replacement bulb |
| National approval | A named product or installation under a national route | Automatic harmonized UNECE status or worldwide recognition |
A product may legitimately carry more than one approval. The error happens when one approval is used to imply another. An R10 mark is useful EMC evidence, but it should not be turned into a road-legality claim for the light source.
H11 and H7/H4 illustrate two different approval architectures
H11 has an established harmonized LED replacement category route. A verified example is the AZMK EB-H11, approved under UN R37 reference E8*37R03/49*0106*00. The safe claim remains tied to that exact approved type and applicable market requirements.
H7 and H4 currently use a different landscape. No adopted harmonized Group 5 H7 or H4 LED replacement category sheet was identified in the reviewed R.E.5 material, while specific products can use national or application-specific approvals in selected markets.
Those national routes can depend on a positive list covering the exact vehicle, headlamp approval number, light function and required accessories. A bulb that physically fits is not automatically inside the approved scope.
Do not treat “Europe” as one retrofit approval rule
Recognition conditions, national approvals and inspection procedures can differ by country. A valid product claim can become misleading when a distributor removes the country or application qualification.
For a harmonized H11 product, keep the approved product configuration and applicable market requirements in the wording. For a national H7 or H4 route, identify the market and use the current approval-holder compatibility information.
No article or product page should guarantee that a vehicle will always pass periodic inspection. The outcome can depend on the country, exact product, vehicle, headlamp, installation, documentation and inspection procedure.
Five claims that should trigger a document check
| Claim | What is missing |
|---|---|
| ECE approved LED | The regulation and approval object |
| R10 street legal | A lighting approval route; R10 is EMC |
| Fits all H7 cars | Application and headlamp approval scope |
| Street legal in Europe | Country-specific recognition basis |
| R112/R149 certified bulb | Clear distinction between headlamp approval and replacement light-source approval |
The fix is not a longer disclaimer. It is a narrower claim that names the exact product, route and scope.
Street-legality questions
Is H11 LEDr street legal?
A valid UN R37-approved H11 LED replacement can support road-use wording subject to the approved product configuration and applicable market requirements.
Is H7 LEDr street legal?
Specific H7 retrofit products can be approved under national or application-specific routes. Coverage depends on the exact product, market and application conditions.
Does R10 make a bulb road legal?
No. R10 concerns electromagnetic compatibility.
Can a seller guarantee inspection pass?
No. Inspection outcomes remain market and case specific.
Official and approval-holder sources
- UNECE, UN Regulation No. 37
- UNECE, Consolidated Resolution R.E.5 register
- UNECE, UN Regulation No. 10 register
- UNECE, UN Regulation No. 149 register
- OSRAM, published compatibility-list example
This guide explains approval structure and does not replace destination-market legal review.
Jack Liu
Jack Liu has worked in automotive LED lighting since 2011 and began designing LED automotive headlight products in 2015. Since 2017, he has concentrated on automotive lighting regulations, particularly LED replacement light sources (LEDr), approval requirements, regulatory definitions, and how product design and optical performance affect legal compliance. Drawing on hands-on product development experience and research into official UNECE and other regulatory documents, he writes to make complex automotive lighting rules clearer and more practical for manufacturers, brands, importers and technical teams.