The European Union Energy Label indicates how efficiently a lamp operates. The energy efficiency classes range from A = very efficient to G = poorest energy performance. Class G lamps are inefficient and should not be used.

Although millions of incandescent lamps are still in use, they consume so much electricity that they manage only a class D rating. Mains voltage halogen lamps also offer only class D or E efficiency at present. Much greater efficiency and energy performance are achieved by modern low-voltage halogen lamps with IRC coating; they reach class C.

Biggest savers: energy-saving lamps and LEDs

Energy-saving lamps with built-in electronic ballast (EB) are the champions of the energy efficiency league, scoring points for minimal power consumption and long life. This qualifies them – depending on type – for class A or B in the EU energy efficiency table. Incidentally, energy-saving lamps are available with the same screw base as conventional incandescent lamps, so there is no problem fitting them into existing luminaires.

Like to know how LEDs are rated? Because of the dynamic development of LED energy efficiency, the luminous diodes have not yet been rated for EU labelling. High-quality brand products work very efficiently and can even exceed the values set by the EU for class A.