For the consumer, testing of the safety of the product by an independent, accredited testing agency is indicated by a mark of conformity. The marks of renowned testing agencies are shown below:
| Comité Electrotechnique Belge | Belgium |
| Danmarks Elektriske Materiel-Kontrol | Danmark |
| European Norm Electrical Certification | Europe |
| Technischer Überwachungsverein | Germany |
| Verband Deutscher Elektrotechniker e.V. | Germany |
| Fertigungsüberwachung des VDE | Germany |
| Electrical Inspectorate | Finland |
| Union Technique de l'Electricité | France |
| British Standards Institute | Great Britain |
| Canadian Standards Association | Canada |
| Warnock Hersey, Nationally Approved Testing Laboratory | Canada |
| Naamloze Vennootschap tot Keuring van Electrotechnisch Materialen | Netherlands |
| Norges Elektriske Materiallkontrol | Norway |
| Österreichischer Verband für Elektrotechnik | Austria |
| Syenska Elektriska Materielkontrollanstalten AB | Sweden |
| Schweizerischer Elektrotechnischer Verein | Switzerland |
| ETL Testing Laboratories | USA |
| Unterwriters Laboratories Inc. | USA |
| Australian Communications Authority | Australia |
| State Committee of the Russian Federation for Standardisation and Metrology | Russia |
| Biuro Badawcze Ds. Jakosci | Poland |
Safety class I Protective earthing, earthed conductor on the equipment casing |
Safety class II Protective insulation |
Safety class III Protective low voltage, < 50 V, on luminaires and transformers for luminaires |
| This symbol applies to discharge lamps. It indicates that these luminaires may be used on non-flammable, flame-retardant or normal flammable building materials in accordance with DIN 4102. |
This symbol applies to luminaires with discharge lamps for installation in and on furnishings (furniture). It indicates that these luminaires may be attached in the specified manner to furnishings made of non-flammable, flame-retardant or normal flammable building materials in accordance with DIN 4102, even if they are coated, varnished or veneered. |
| This symbol applies to luminaires with discharge lamps and luminaires for incandescent lamps for installation in and on furnishings (furniture). It indicates that these luminaires may be attached in the specified manner to furnishings made of non-flammable, flame-retardant or normal flammable building materials according to DIN 4102, even if they are coated, varnished or veneered, but also to materials with an unknown fire response. |
