EEI = Pcor / PRef
with Pcor = Rated power · correction factor (according to light generation technology)
and PRef = Reference power, derived from useful luminous flux by formula
An energy consumption labelling system (energylabel) has been around for a long time for many products in the EU, so it is a well-known obligation.
The energy label is intended to be a simple guide to choosing and buying environmentally friendly, energy-saving products - and is now entering its third round with a new directive.
In the beginning, only 'mains voltage lamps for generating light in the household' had to carry such a label, but now all light sources must. 'Light sources' are all lamps and luminaires from which the light source cannot be removed.
In implementation of the framework directive from 2017, the energy efficiency label is therefore 'reset' to classes A to G for light sources, taking effect from Sept 1st 2021 and will thus return to its origin (1994).
'Old' directive EU 874/2012, in power until Aug 31st 2021
All lamps and LED modules with luminous flux > 30lm, explicitly quoted:
Exceptions
These energy labels for lamps can still be found at the regarded product's online-datasheet which was booked into the warehouse before Sept. 1st 2021 (= brought into the market).
Current directive EU 2019/2015, effective from Sept 1st 2021
All light sources with luminous flux between 60 and 82,000 lm, and light generation by
The most Important Exceptions
From May 1st 2021, all current light sources must be entered into the European Product Data Base (EPREL).
Implementation (compulsory) must be observed from Sept 1st 2021, the label for luminaires ('containing products' = luminaires with exchangeable light source) is no longer required from Dec 25th 2019.
Light sources that are subject to labeling with the 'old' energy label are given a transitional period of 18 months, so they must carry the new label from March 1st, 2023 if they become visible to end customers in retail, for example - and then the products must be re-labeled if necessary. In this case, stickers with the current label can be requested from us.
Products or models that came onto the market before the Energy Labeling Framework Directive came into force do not have to be registered in EPREL. This means that for light sources which were placed on the market before August 1st, 2017, there is no obligation to register or to relabel.
(no change)
Here should the relevant information be shown
The label itself should be shown
According to the directive EU 874/2012, in power until Aug 31st 2021:
Calculation EEI
EEI = Pcor / PRef
with Pcor = Rated power · correction factor (according to light generation technology)
and PRef = Reference power, derived from useful luminous flux by formula
Directive EU 2019/2015, effective from Sept 1st 2021:
Calculation of mains voltage luminous efficiency ηTM
with FTM = Factor for the type of light source
and Pon = quoted input power (watt)
and Φuse = useful luminous flux
I Name or trademark of supplier (Radium)
II Model code of supplier (alphanumeric code, e.g EAN)
'weighted energy consumption' Ec
I Name or trademark of supplier (Radium)
II Model code of supplier (e.g EAN)
III Scale of energy efficiency classes
IV 'weighted energy consumption' Ec in kWH/1000h
V QR code (to product data sheet)
VI Energy efficiency class of product
not relevant any more since Dec 25th 2019 !
Examples shown in the directive:
05.09.2025 - Exchange with LightingEurope!
We recently had the pleasure of welcoming guests from LightingEurope, the European lighting…
28.08.2025 - From panels to floodlights to high bays.
In addition to our proven lamp portfolio, we will soon also present an innovative luminaire…