Saturday, November 27

▷ TÜV SÜD informs: New efficiency classes for light sources

28.10.2021 – 12:35


Munich (ots)

The days are getting shorter again and people are spending more time indoors. Light not only brings brightness into a room, it can also create a mood in the room. Effects can be achieved with ceiling or wall lights or with eye-catchers such as floor lamps. In addition, there are decorative fairy lights and glowing stars or balls in the living area for a cozy atmosphere. But in addition to the ambience, energy consumption is also important and the monthly electricity bill can be reduced significantly with the right selection of LED lamps. Efficiency classes provide information about energy consumption. Fabian Fligge, product specialist for lighting at TÜV SÜD, knows what consumers should pay attention to.

In order to conserve natural resources, many countries have passed statutory regulations that define the minimum requirements for the energy efficiency of energy-operated devices. In Europe, these are set out in the Ecodesign Directive, which has been revised and has been in force since September 2021. “Rising energy costs are a current issue and private households should critically examine all electricity consumers in the house to see whether the energy consumption can be reduced. There is also potential for savings in lighting,” explains Fabian Fligge. Different light intensities are required in the household, so a desk lamp must shine brightly, while in the living room it can have more atmosphere with a slightly weaker light. In order to achieve the desired brightness, energy has to be used. This process is all the more efficient, the less energy is required to achieve the desired goal.

New efficiency classes A to G

A regulation for ecodesign and a regulation for energy classes apply within the European Union. When it comes to choosing lamps, consumers are interested in the energy label and the Ecodesign Directive. “So far, consumers have oriented themselves towards the energy efficiency classes A ++ to E. Since more and more light sources were classified as A ++, a further differentiation upwards was necessary,” explains the expert. The technological advancement improved the energy efficiency over the years, which is why the European Union saw a downgrading of the energy efficiency classes from A to G as necessary. The plus classes A + and A ++ introduced in 2012 were no longer applicable and the requirements placed on manufacturers were significantly increased. Since very few light sources still have classes A and B, the incentive has been created for manufacturers to work even more on the energy efficiency of their products.

What does the energy efficiency say?

The key parameter is the light output, measured in lumens per watt (lm / W). The seven energy efficiency classes are graduated in steps of 25 lumens / watt. A value of 210 lumens / watt or higher is required for the highest efficiency class, a light source in the lowest class has a value of less than 85 lumens / watt. A lamp that is in the green range of the mains voltage light output has a high light output with low energy consumption at the same time.

Consumer orientation

“In order to provide consumers with a good orientation about energy consumption, the EU regulation requires the energy label to be attached in a certain minimum size and on the side of the packaging facing the customer,” says Fabian Fligge. The colors, the font and the appearance are laid down in the regulation. If it is not possible to attach the label to the front, an arrow with the energy efficiency class can be used as an alternative. The most important innovation is also the QR code, with which consumers can call up additional information on the light source in a database, such as further information on color rendering or the spectrum.

Among other things, this information must be clearly displayed on the packaging:

  • Useful luminous flux
  • lifespan
  • Maximum power consumption
  • Color rendering index (CRI)
  • Power consumption in standby mode

On the light source itself, information on the useful luminous flux and the correlated color temperature are applied in easily legible form.

Different lamps are on offer in the trade. Fabian Fligge gives a brief overview of halogen spotlights and LED lamps:

Halogen lamps fall in the ecological balance because the energy consumption of halogen lamps is significantly higher than that of LED lamps. With around 2,000 hours of lighting time, they have a comparatively short lifespan.

Led lamps are currently the method of choice. “The low energy consumption is convincing, they require up to 85 percent less electricity than conventional light bulbs and noticeably reduce consumption in the home,” explains Fabian Fligge. The service life is between 35,000 and 50,000 hours and so make up for their slightly higher purchase price. They do not contain any toxic chemicals and are therefore environmentally friendly and harmless to health.

When choosing lighting, consumers should make sure that light also creates an atmosphere in the room. It makes a big difference whether warm or cold light is used. LED lamps with 2,700 Kelvin, for example, produce warm white light (more suitable in the evening or in the bedroom), lamps with 4,000 Kelvin produce neutral white light (with high color rendering, for example, well suited in the kitchen or at the dining table) and lamps with 5,000 Kelvin cold or daylight white light. “Combi lamps offer warm-white or neutral-white light in one and can be controlled in different ways using a remote control,” explains Fabian Fligge. Flexible lighting design is possible with dimmers. Before buying, please note the information on the packaging as to whether the lamp can also be dimmed and whether it goes with the domestic dimmer.

Certified safety

In private households, security should not be neglected, especially when it comes to electricity. Consumers should have a feeling of security when buying lamps. Products that have the GS mark for “Tested Safety” and the blue TÜV SÜD octagon have been tested in laboratories for safety, durability, color rendering and start-up and ignition times, among other things.

Further information on lights and lamps can be found at

Press contact:

Dirk Moser-Delarami
Corporate communication
Westendstrasse 199, 80686 Munich
Tel.: +49 (0) 89 / 57 91 – 15 92
Fax: +49 (0) 89 / 57 91 – 22 69
Email: [email protected]

Original content from: TÜV SÜD AG, transmitted by news aktuell

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