What is the fundamental difference between EN 62471 and EN 60825?

EN 62471 covers **incoherent** optical radiation sources: LEDs, OLEDs, fluorescent, halogen, high-intensity discharge (HID), incandescent, tanning lamps, projectors. EN 60825 covers **coherent** sources: lasers, laser diodes, LEDs used as fibre-optic communication emitters. The boundary is not the emitter type itself but the spatial and temporal coherence of the emitted beam: a product can contain LEDs that fall under 62471 and a laser module that falls under 60825 at the same time. Highly directional LEDs or hybrid LED-laser sources are handled case by case and must be evaluated under both references when the emission nature is ambiguous. Final classification rests on spectral and angular measurement, not on the commercial name of the component.

What do the four EN 62471 risk groups correspond to?

EN 62471 classifies incoherent sources into four groups after measuring photobiological quantities at the regulated distances: **Exempt** (no photobiological risk under normal conditions of use, exposure time limited by natural reflexes), **RG1 Low Risk** (no risk under normal conditions of use, low exposure), **RG2 Moderate Risk** (natural user reflexes, including aversion to bright light and blink reflex, are sufficient to limit exposure), **RG3 High Risk** (damage possible even after very brief or momentary exposure; high-radiance industrial lamps, powerful UV sources). The limit values associated with each group (in W/m2, J/m2, W/sr or cd/m2 depending on the mechanism) appear in the standard tables and must be read directly in the IEC text to be enforceable.

What do the seven EN 60825-1 laser classes correspond to?

EN 60825-1 defines seven laser product classes: **Class 1** (inherently safe in all reasonably foreseeable conditions of use), **Class 1M** (inherently safe unless viewing is augmented by an optical instrument such as binoculars or a loupe), **Class 2** (visible 400 nm to 700 nm, low power, safety provided by the aversion response including blink reflex), **Class 2M** (Class 2 except with optical instrument), **Class 3R** (limited risk, slightly exceeds Class 1 or 2 limits), **Class 3B** (substantial risk to the eye from direct or specular exposure), **Class 4** (high risk, eye and skin injury, fire risk, potentially hazardous diffuse beam). The **AEL (Accessible Emission Limit)** values associated with each class appear in the standard tables and depend on wavelength, emission duration and beam divergence. These values must be cited as published by IEC.

How does the "blue-light" risk assessment work for a white LED?

The **blue-light hazard (BLH)** mechanism is one of seven mechanisms in EN 62471. It quantifies the retinal photochemical risk caused by prolonged exposure to wavelengths in the 300 nm to 700 nm band, weighted by the action function B(lambda). On a standard white LED based on a blue 450 nm die converted by yellow-green phosphor (Cool Solid Phosphor, CSP), the 450 nm component is dominant and the BLH risk can be non-negligible. The method measures the **B-weighted luminance** in cd/m2 or the **B-weighted radiance** in W/m2/sr at a specified distance, integrates over the solid angle seen by the eye, and compares to RG1, RG2, RG3 limits. Final classification depends on the **measurement distance** (200 mm for general-lighting sources, shorter distance for special sources) and on the **integration solid angle** (1.7 mrad initial, evolving with exposure time).

What is the regulatory boundary between IEC 60825-1 and FDA CDRH 21 CFR 1040?

In the United States, laser products are regulated by the **CDRH (Center for Devices and Radiological Health) of the FDA** under **21 CFR Part 1040 Performance Standards for Light-Emitting Products**. This framework, predating the IEC classification, defines its own laser classes (Class I, IIa, II, IIIa, IIIb, IV) historically distinct from IEC. Since 2007, the FDA has accepted the **IEC 60825-1 classification through Laser Notice No. 50** subject to an administrative filing (Laser Product Report or Initial Report). In practice, a manufacturer who follows IEC 60825-1 can commercialise in the US provided it files its product with the FDA and complies with Laser Notice No. 50 labelling rules. Labelling must however include the US-specific mentions (Caution, Danger, PHS Act mention, FDA Compliance Statement). In no case does European IEC 60825-1 compliance exempt from a CDRH filing prior to placing on the US market.

Can an automotive LIDAR be declared Class 1 without measurement?

No. A typical automotive LIDAR uses a laser source around **905 nm** or **1550 nm** with high peak power but short pulse duration and low duty cycle, which can produce a Class 1 result under EN 60825-1 after temporal weighting. But classification depends on **beam divergence**, the **measurement aperture** (7 mm diameter for the relaxed pupil, standardised measurement distances), **pulse profile**, **pulse repetition rate** and **temporal averaging** (EN 60825-1 C5 summation rule which penalises pulse trains). A measurement in an accredited laboratory with a photometer and aperture compliant with EN 60825-1 is required to confirm the class. A Class 1 declaration without measurement and without justification of the AEL calculation constitutes a non-conformity and has already led to recalls (case of a North American long-range LIDAR manufacturer in 2019).

Which EN 62471 and EN 60825 sub-parts are useful to an LED or luminaire manufacturer?

EN 62471-1 is the **technical base** (measurement method, photobiological quantities, classification). EN 62471-2 gives manufacturing, installation and maintenance requirements. EN 62471-3 deals with **infrared hazards** for thermal sources. EN 62471-5 covers **image projectors** (data projectors). EN 62471-6 covers special UV sources. EN 62471-7 covers the **photobiology of pulsed lamps** such as flash. For laser, EN 60825-1 is the **base**, EN 60825-2 deals with **fibre-optic communication** systems, EN 60825-4 with **laser enclosures and machines** (laser guards), EN 60825-8 and EN 60825-9 deal with **medical laser** applications and **measurement and illumination laser** applications, EN 60825-12 covers **LEDs used in fibre-optic communications**. The relevant sub-part depends strictly on the application of the product.

What are the most frequent pitfalls observed in practice?

The first pitfall is **confusing absence of visibility with absence of risk**: an invisible infrared beam at 905 nm or 1550 nm can damage the retina without warning. The second is to **classify a product with a laser source as an LED** in order to evade EN 60825 and only run EN 62471: beam coherence is an objective criterion, not a commercial label. The third is to **measure at a non-regulated distance**: EN 62471 sets 200 mm for general lighting; EN 60825 uses distances depending on class and instrument. The fourth is to **not declare the blue-light risk on a high-luminance LED luminaire** when measurement places the product in RG2: the RG2-or-higher labelling directive is mandatory. The fifth is to **not redo classification after component substitution**: a change of LED driver or phosphor can move a luminaire from RG1 to RG2. The sixth is **forgetting Laser Notice No. 50** for US export; the seventh is the **classification of an AR display or VR headset without a retinal-risk assessment** when the eye-source proximity makes proper measurement systematically mandatory.

How does cybersecurity or firmware reliability impact laser classification?

EN 60825-1 recognises that the class of a laser product depends on the **Accessible Emission Limit** under **reasonably foreseeable** conditions of use, including single-fault condition. A product whose laser power is limited by firmware (for example through a DAC controlling the laser-diode current) must demonstrate that **single failure** of the firmware, DAC or microcontroller cannot lead to an emission above the declared AEL. The rule is explicit in EN 60825-1 clause 4.3 (single-fault condition). In practice this imposes: hardware limitation (series resistor, TVS diode), watchdog with current cutoff on anomaly, monitoring photodiode with redundant feedback loop, and certification of the control chain for Class 1, 1M, 2, 2M. A cybersecurity attack that exploits firmware to increase emission constitutes a "reasonably foreseeable" failure since the spread of IoT connectivity in optical emission products.

EN 62471 and EN 60825: photobiological and laser safety

Author Hugues Orgitello Last updated 27 May 2026 ~15 min read

Guide - Optical safety

EN 62471 and EN 60825 are the two horizontal European product-safety standards for products emitting optical radiation. EN 62471 deals with incoherent sources (LEDs, OLEDs, fluorescent, halogen, discharge, incandescent lamps) in four risk groups, Exempt, RG1, RG2, RG3. EN 60825-1 deals with laser products and LEDs used in fibre-optic transmission in seven classes, from Class 1 to Class 4. Both specify the relevant photobiological quantities (radiance, irradiance, dose), measurement distances and apertures, classification and mandatory marking. This page sets out the boundary between incoherent and coherent emission, the content of the group and class tables, the blue-light hazard methodology, the articulation with the US FDA CDRH and ANSI Z136 frameworks, and common pitfalls observed on LED, LIDAR, AR/VR and automotive HUD products.

One horizontal family, two parallel references

EN 62471 and EN 60825 are horizontal standards: they apply transversally to any product family emitting optical radiation in the 200 nm to 3000 nm band (ultraviolet, visible, infrared), regardless of the product function. A general-lighting luminaire, a cinema projector, an augmented-reality headset, an automotive LIDAR, a medical scanner, an electronic cigarette with an LED indicator, a television are all in scope as soon as they emit in this band.

The split between the two texts is based on radiation coherence:

Characteristic	EN 62471 (incoherent radiation)	EN 60825 (laser radiation)
Source	LED, OLED, fluorescent, halogen, HID, incandescent, discharge lamp, photographic flash	Laser, laser diode, LED for fibre-optic communication
Spatial coherence	Low, extended emission, typical Lambertian profile	High, collimated beam, low divergence
Temporal coherence	Low, broad spectrum	High, narrow line
Dominant measurement	Action-function-weighted radiance or luminance	AEL (Accessible Emission Limit) integrated over aperture and duration
Classification	4 risk groups (Exempt, RG1, RG2, RG3)	7 classes (1, 1M, 2, 2M, 3R, 3B, 4)
Origin	European mandate, alignment with CIE S 009	US ANSI / IEC origin since 1976

The routing rule is simple: if the source is laser or fibre-LED, EN 60825 applies; otherwise EN 62471 applies. For hybrid products (LEDs in an AR projector with a high-directivity combiner-optic, for example), notified-body advice may be required and both standards may be evaluated in parallel.

EN 62471: photobiological safety of incoherent sources

Scope

IEC 62471 applies to lamps and lighting systems in the broad sense: luminaires, projectors, displays (through their backlight source or OLED emitters), specialised lamps (UV for disinfection, IR for heating, tanning lamps), signalling lamps. Lasers and fibre-optic LEDs are explicitly excluded (cross-reference to EN 60825).

The standard covers a spectral band of 200 nm to 3000 nm, treated through seven distinct biological mechanisms:

Mechanism	Band	Action function	Target
Actinic UV (UV-A, UV-B, UV-C)	200 nm to 400 nm	S(lambda)	Skin burn, erythema, kerato-conjunctivitis
Near UV	315 nm to 400 nm	constant	Photo-aging, lens cataract
Blue-light (BLH)	300 nm to 700 nm	B(lambda)	Retinal phototoxicity, macular degeneration
Retinal thermal	380 nm to 1400 nm	R(lambda)	Retinal thermal burn
Retinal thermal weakly visible	780 nm to 1400 nm	modified R(lambda)	Source weakly visible, no aversion reflex
Ocular IR (IR-A, IR-B)	780 nm to 3000 nm	constant	Thermal cataract, lens opacification
Skin thermal burn	380 nm to 3000 nm	constant	Cutaneous hyperthermia

Four risk groups

After measuring photobiological quantities at the regulated distances and apertures, the source is classified in one of the four groups:

Group	Criterion	Typical examples
Exempt	No photobiological risk even after prolonged uncontrolled exposure	Low-luminance LED, household incandescent bulb, mass-market OLED, standard LCD display
RG1 Low Risk	No risk under normal use conditions, typical exposure durations below threshold time	Domestic halogen lamp, residential lighting LED, low-power projector
RG2 Moderate Risk	Natural aversion reflexes (blink, head movement) are sufficient to limit exposure. Mandatory marking stating the group	High-luminance LED projector, UV insect lamp, highly directional LED, some pico-projectors
RG3 High Risk	Risk even from very brief exposure. Mandatory marking and safety signage, installation and use restrictions	UV-C disinfection lamp, high-power industrial lamp, high-end cinema projector, xenon arc lamp

The limit values in W/m2, J/m2, W/sr or cd/m2 associated with each group and each mechanism appear in the tables of the IEC 62471-1:2006 text. They must be read directly in the standard to be enforceable. Any online summary does not relieve the user from consulting the original text from CENELEC or IEC.

Distances, apertures and BLH calculation

For general lighting, the reference distance of 200 mm is used for risk-group comparisons; different distances are specified for specialised sources (projectors, industrial lamps, UV disinfection). The measurement aperture simulates the human pupil (7 mm at rest). The initial integration solid angle is 1.7 mrad (visual acuity limit) and widens with exposure time.

For the BLH mechanism, the source emission spectrum is measured between 300 nm and 700 nm (typical 5 nm resolution), weighted by the B(lambda) action function (peaks around 437 nm), integrated over the regulated solid angle seen by the eye, and compared to RG1, RG2, RG3 limits for a reference exposure time (10 000 s for permanent lighting). On a phosphor-converted or CSP (Chip Scale Package) white LED with a 450 nm blue die, the 450 nm component is dominant: a high-luminance, highly directional LED frequently switches to RG2 and requires the corresponding marking.

EN 62471 sub-part hierarchy

Sub-part	Scope
EN 62471-1:2008	General requirements, measurement method, quantities, classification
EN 62471-2:2009	Manufacturing requirements, marking and consumer information
EN IEC 62471-3:2018	Ultraviolet and infrared hazards from lamps and lighting systems
EN 62471-5:2015	Image projectors (data projectors, pico-projectors, portable AR projectors)
EN IEC 62471-6:2022	Ultraviolet sources
EN 62471-7:2017	Pulsed lamps and photographic flashes

EN 60825: safety of laser products

Scope

IEC 60825-1 applies to any laser product in the 180 nm to 1 mm band, covering ultraviolet, visible and far-infrared. It includes laser pointers, barcode readers, laser printers, medical lasers, LIDARs, laser machining systems, fibre-optic communication lasers, laser projectors and laser sources embedded in VR headsets and AR glasses.

Classification rests on AEL (Accessible Emission Limit): the maximum power or energy to which an observer can be exposed through a standardised aperture, during a standardised duration, for the laser wavelength. The AEL tables form the normative core of EN 60825-1 and must be cited as published by IEC.

The seven laser classes

Class	Definition	Example product	Minimum marking
Class 1	Inherently safe under all reasonably foreseeable use conditions, including single-fault condition	CD/DVD reader, office laser printer, sealed barcode reader, some automotive LIDARs	No hazard pictogram required, mention "Class 1 Laser Product"
Class 1M	Identical to Class 1 unless vision is augmented by an optical instrument (loupe, binoculars)	Multimode fibre-optic communication laser source	Specific label "Class 1M, do not view directly with optical instruments"
Class 2	Visible laser 400 to 700 nm, low power (typically less than 1 mW continuous), safety provided by aversion reflex including blink (typically 0.25 s)	Compliant red or green consumer laser pointer	Warning label, laser symbol
Class 2M	Class 2 except with optical instrument	Wide-beam collimated laser pointer	Specific label
Class 3R	Limited risk, slightly exceeds Class 1 or 2 limits. Direct exposure potentially hazardous but low probability	Industrial laser pointers, construction laser levels	Warning label, recommended user training
Class 3B	Substantial risk to the eye from direct or specular reflection exposure. Diffuse exposure generally non-hazardous	Demonstration lasers, laboratory lasers, some medical lasers	Hazard symbol, mandatory interlock and beam stop
Class 4	High risk: eye and skin injury, potentially hazardous diffuse beam, fire risk	Machining lasers, high-power surgical medical lasers, high-power entertainment lasers	All protection measures: interlock, monitoring, enclosure, beam stop, complete signage, operator training

Cumulative safety measures by class

EN 60825-1 imposes cumulative protection measures by class: Class 1 / 1M, protective housing that keeps accessible emission below AEL under normal use and single-fault condition; Class 2 / 2M, housing, warning label, class identification; Class 3R, housing, hazard label, key switch or code recommended, user training, beam stop for fixed installations; Class 3B, robust housing, safety interlock on access apertures, visible emission indicator, attenuator (beam stop or shutter), mandatory key switch, operator training, declared Nominal Ocular Hazard Distance (NOHD); Class 4, all of the above plus enclosure around the laser area, illuminated activation signage, area access control, laser-protection eyewear matched to the wavelength, Laser Safety Officer (LSO) training under ANSI Z136 for professional applications.

Single-fault rule and firmware reliability

EN 60825-1 clause 4.3 establishes the single-fault principle: a laser product must retain its emission-class AEL even in single-fault condition of an accessible component. For products where laser power is regulated by firmware (laser-diode driver controlled by microcontroller), this requires a hardware limitation independent of firmware (series resistor, thermal fuse, cut-off transistor), a hardware watchdog, a monitoring photodiode with redundant feedback loop, and for Class 3B / 4 full redundancy of the control chain. The spread of IoT connectivity extends the principle: a cyber attack that modifies firmware is treated as a "reasonably foreseeable" failure, which mandates firmware signing, secure-boot attestation and controlled-update measures for connected laser products.

EN 60825 sub-part hierarchy

Sub-part	Scope
EN 60825-1:2014+A11:2021	Classification and general requirements
EN 60825-2:2010	Safety of fibre-optic communication systems
EN 60825-4:2018	Laser guards for machining systems
EN 60825-8:2010	Medical laser applications
EN 60825-9:2010	Laser sources for illumination and signage
EN 60825-10:2003	Practical protection measures on laser sites
EN 60825-12:2019	Safety of free-space optical communication (FSO) systems

US framework: FDA CDRH 21 CFR 1040 and ANSI Z136

FDA CDRH 21 CFR Part 1040

In the United States, laser products are regulated by the Center for Devices and Radiological Health (CDRH) of the FDA under 21 CFR Part 1040 Performance Standards for Light-Emitting Products, sub-part 1040.10 for laser products and 1040.11 for specific laser products (medical, surveying).

This framework, predating the IEC classification, historically defines its own classes (Class I, IIa, II, IIIa, IIIb, IV in Roman numerals). Since 2007, the FDA has published Laser Notice No. 50, which accepts the IEC 60825-1 classification within the 21 CFR 1040 framework, subject to compliance with certain US-specific requirements:

Filing an Initial Report (Laser Product Report) with CDRH before commercialisation.
Labelling including the US mentions Caution or Danger depending on class.
FDA Compliance Statement indicating compliance with 21 CFR 1040 and Laser Notice No. 50.
Identification of the manufacturer and model number, manufacturing date, AEL.

A European manufacturer compliant with EN 60825-1 can sell in the US provided this filing is completed and labelling is respected. IEC compliance alone is never sufficient: the FDA procedure is a distinct administrative act.

ANSI Z136: workplace laser safety

ANSI Z136 sub-part	Scope
ANSI Z136.1	Safe use of lasers (general rule, occupational safety)
ANSI Z136.2	Safe use of optical-fibre communication systems
ANSI Z136.3	Safe use of lasers in health care
ANSI Z136.4	Recommended practice for laser safety measurements
ANSI Z136.6	Safe use of lasers outdoors
ANSI Z136.8	Safe use of lasers in research, development or testing

ANSI Z136 is the US reference for the use of laser products by operators: Laser Safety Officer (LSO) training, calculation of NOHD (Nominal Ocular Hazard Distance), rules for use of laser-protection eyewear by optical density (OD), emergency procedures. ANSI Z136 does not apply to product design (governed by EN 60825-1 or 21 CFR 1040) but to its use environment. A manufacturer delivering a Class 3B or 4 laser to a US customer must provide documentation enabling the user to comply with ANSI Z136 at its operating site.

IEC 60825 vs FDA CDRH comparison

Criterion	IEC 60825-1 (EU)	FDA CDRH 21 CFR 1040 (US)
Classes	1, 1M, 2, 2M, 3R, 3B, 4 (Arabic numerals)	I, IIa, II, IIIa, IIIb, IV (Roman numerals, predating)
Modern correspondence	Class 1 (IEC)	Class I, IIa (CDRH historical) or Class 1 via Laser Notice No. 50
Placing-on-market procedure	Declaration of conformity, CE marking	Initial Report to CDRH prior to commercialisation
Labelling	IEC pictograms, mention "Class N Laser Product"	US pictograms, "Caution" or "Danger" depending on class, FDA Compliance Statement
Update	Regular IEC amendments	Laser Notices published case by case
ANSI Z136 boundary	Separate application, EN 60825 covers only the product	ANSI Z136 for workplace use, distinct from 21 CFR 1040

Implications for modern products

LED lighting and luminaires

For a domestic or tertiary LED luminaire, EN 62471 is applied to the LED + optic + driver combination. Classification depends on:

colour temperature: a 4000 K to 6500 K luminaire (cool white) has a higher 450 nm component than a 2700 K (warm white);
luminance: expressed in cd/m2, depends on flux and emissive area;
directivity: a 30-degree spot concentrates energy over a reduced solid angle, increasing the B-weighted radiance seen by the eye.

A high-luminance cool-white LED luminaire may switch to RG2 and require the marking "Moderate Risk - do not stare at the source". The ecodesign Directive (EU) 2019/2020 and the RoHS Directive apply in parallel. The EN 60598 guide covers the electrical-safety aspects of luminaires; EN 62471 covers only the photobiological aspect.

Displays and AR/VR headsets

High-luminance displays of recent smartphones (up to 2000 cd/m2 in HDR mode) and AR/VR headsets bring the source close to the eye. For AR/VR headsets, the source-retina distance is typically 20 mm to 50 mm through the combiner optic, ten times less than the standard EN 62471 measurement distance. The technical report IEC TR 63145-22-20 specifies photobiological measurement methods adapted to head-mounted displays (HMD) and is the mandatory complementary reference for this product type.

Automotive LIDAR and optical sensors

Automotive LIDARs typically use laser sources at 905 nm or 1550 nm. Classification depends on the pulse profile (1 ns to 100 ns), repetition rate (kHz to MHz), beam divergence, EN 60825-1 C5 integration rule (penalises pulse trains) and scanning mode (mechanical, MEMS, flash, OPA). A Class 1 claim without measurement is risky: the C5 rule and measurement apertures may place the product in Class 1M or Class 3R after complete analysis. Verification must be performed by an ISO/IEC 17025 accredited laboratory equipped for pulsed-AEL measurements.

HUDs and automotive headlamps

Heads-Up Displays (HUDs) use LEDs, DLP micro-projectors or MEMS micro-lasers; the 62471 / 60825 boundary depends on the source type. For road signalling and LED matrix headlamps, EN 62471 is applied: a matrix LED headlamp can reach very high central-zone luminance and switch to RG2. ECE R112 and R128 cover photometric aspects (visibility, glare) but do not substitute for EN 62471.

Frequent pitfalls

Pitfall	Consequence
Classifying a product with a visible laser source (for example pointer or scan pico-projector) as LED to evade EN 60825	Non-conformity, mandatory re-qualification, possible market withdrawal
Measuring an LED luminaire at 500 mm instead of 200 mm without justification	Under-estimation of B-weighted radiance, RG1 classification when product is RG2
Claiming Class 1 on a LIDAR without accredited AEL measurement	Real retinal risk to user or pedestrians, possible recall, civil and criminal liability
Omitting the C5 rule on a high-repetition pulsed laser	Underestimated AEL, incorrect classification
Evaluating a VR or AR headset under EN 62471 without applying IEC TR 63145	Under-estimated proximal retinal risk, inappropriate measurement distance
Neglecting IR risk on a halogen or xenon-lamp projector	Possible thermal lens burn, RG2 or RG3 not declared
Filing FDA via Laser Notice No. 50 without an Initial Report	US import prohibited, customs hold
Treating blue-light risk as a "consumer-rights polemic" and not measuring it	EN 62471 non-conformity, probable market-surveillance observation, attack on presumption of conformity
Not redoing classification after phosphor or LED-driver substitution	Drift of classification, RG1 in theory but RG2 in practice
Considering an industrial product with trained user to be exempt from labelling	False: EN 60825-1 and EN 62471 require minimum labelling independent of use context
Omitting UV component measurement on a discharge lamp or "white" source	The actinic UV mechanism can place the product in RG2 even if visible light appears benign
Considering that IEC 60825-1 compliance exempts from ANSI Z136 in US user documentation	False: both are complementary; ANSI Z136 governs operational use and must be cited in the US user manual

Compliance procedure

Step	Actor	Deliverable
Scoping	Design office, manufacturer	Identify the nature of emission (coherent / incoherent), choose EN 62471 or EN 60825 or both
Pre-classification	Design office	Analytical risk-group or class estimate from component data (LED datasheet, laser-diode datasheet)
Safety-aware design	Design office, electronics, optics	Hardware power limit, firmware watchdog, monitoring photodiode for laser products, choice of phosphor and LED driver to reduce BLH
In-house pre-tests	Manufacturer's laboratory	Radiance, irradiance or AEL measurement with calibrated instrumentation
Tests in accredited laboratory	ISO/IEC 17025 laboratory	Enforceable report, EN 62471 or EN 60825-1 classification, declared AEL, traceable photometers and couplers
Labelling	Manufacturer	RG (62471) or Class (60825) marking on product and packaging, mention compliant with normative text, in local language
Technical file	Manufacturer	Test report, classification justification, protection measures implemented, cybersecurity plan for connected laser products
EU declaration	Manufacturer or authorised representative	Mention of EN 62471 and / or EN 60825-1 compliance in EU declaration of conformity
FDA filing if US export	Manufacturer or US importer	Initial Report with CDRH, FDA Compliance Statement on label, annual Annual Report update

Take-aways

EN 62471 and EN 60825 are the two horizontal European standards for the safety of optical-emission products, distinguishing incoherent sources (62471) from laser products (60825).
EN 62471 classifies in four groups: Exempt, RG1, RG2 (mandatory marking), RG3 (full marking and signage).
EN 60825-1 classifies in seven classes: 1, 1M, 2, 2M, 3R, 3B, 4, each class imposing cumulative protection measures proportionate to the risk.
The blue-light mechanism is dominant on modern blue-die white LEDs; its measurement must be done at the regulated distance and with B(lambda) weighting.
EN 60825-1 imposes the single-fault rule: the AEL class must be preserved in case of single-component failure, which requires hardware protections independent of firmware.
The US framework is distinct: FDA CDRH 21 CFR 1040 regulates laser products on US soil, with Laser Notice No. 50 accepting the IEC classification subject to administrative filing.
ANSI Z136 deals with operational use of lasers in professional environments and complements (without replacing) the product regulation.
Modern products (automotive LIDAR, AR/VR headsets, HUDs, high-luminance displays) introduce specific measurement constraints requiring IEC TR 63145 for HMDs and the C5 rule for pulsed lasers.
Firmware cybersecurity has become integral to laser safety for connected products: an attack that would modify emission power is treated as a foreseeable failure.

EN 62471 and EN 60825: photobiological and laser safety

One horizontal family, two parallel references

EN 62471: photobiological safety of incoherent sources

Scope

Four risk groups

Distances, apertures and BLH calculation

EN 62471 sub-part hierarchy

EN 60825: safety of laser products

Scope

The seven laser classes

Cumulative safety measures by class

Single-fault rule and firmware reliability

EN 60825 sub-part hierarchy

US framework: FDA CDRH 21 CFR 1040 and ANSI Z136

FDA CDRH 21 CFR Part 1040

ANSI Z136: workplace laser safety

IEC 60825 vs FDA CDRH comparison

Implications for modern products

LED lighting and luminaires

Displays and AR/VR headsets

Automotive LIDAR and optical sensors

HUDs and automotive headlamps

Frequent pitfalls

Compliance procedure

Take-aways

Further reading

See also