Equivalency Code For Tanning Appliance Fluorescent Ultraviolet Lamps

Categories: Certification & Calibration, General & Specialty Lighting, Safety & Compliance Testing

Tanning appliances should be type-tested1 according to their erythemal UVA and UVB irradiance.

See our application page on Type-testing of tanning appliances

In EN/ IEC 612282 is introduced an equivalency code for tanning appliance fluorescent ultraviolet lamps to ensure lamp replacement of equivalent type which does not change the type-rating of the product.

This standard requires that the spectral irradiance produced by the lamp under test be measured at a distance of no less than 10cm, corrected to 25cm and at intervals of 1 nm from 250 nm to 400 nm, and weighted against the CIE erythemal and the NMSC spectral weighting functions to compute the eyrthemal irradiance 250-400nm, the long-wave UV NMSC irradiance (320-400nm) and the short-wave NMSC irradiance (250-320nm)

The equivalency code should take the following form, "Wattage–Reflector type code–UV code", for example:


Reflector type

UV code

Nominal lamp wattage

- B for lamps with a broad reflector angle > 230°;


- N for lamps with a narrow reflector angle < 200°;


R for lamps with a regular reflector 200°≤α≤230°


O for non-reflector lamps;

= X/Y


X = total erythema effective UV irradiance over the range 250 nm – 400 nm, in mW.m-2 rounded to the nearest integer


Y = ratio of the NMSC effective UV irradiances ≤320 nm and > 320 nm, rounded to one decimal place.


*The effective values are at 25 cm distance and under conditions of optimum UV irradiance.


For EN editions of the following, please consult your local standards organisation.

IEC 60335-2-27 Household and similar electrical appliances – Safety – Part 2-27: Particular requirements for appliances for skin exposure to ultraviolet and infrared radiation

IEC 61228 Fluorescent ultraviolet lamps used for tanning - Measurement and specification method