LED has been the big trend for some years now. It is becoming much more difficult to buy ‘classic’ light bulbs – sometimes you are even obliged to use energy-saving LED bulbs. The classic light bulb has therefore largely been replaced by LED technology. In the field of energy saving, LED technology has evolved tremendously in the last few years, to move ahead of the competition. The fact that LED bulbs contain no mercury must be regarded as a positive. The technology has a downside too, however. A study from Öko Test shows that LED bulbs with screw threads continue to emit large amounts of electrosmog.
The question therefore arises as to why LED bulbs produce electrosmog when traditional light bulbs do not.
Light bulbs emit no electrosmog. If the lamp is not grounded, it emits alternating electric fields in the low-frequency range. As most lamps are connected only by two wires without earthing, almost all lamps produce measurable low-frequency electric fields that would be easy to minimise with earthing and/or shielded cables.
LED bulbs produce electrosmog since the required switching power supply emits electromagnetic pulses. This is responsible also for the annoying flickering of the lamps. Although the amount of radiation has decreased in the past few years, its level is still not satisfactory. The electromagnetic radiation can be reduced by maintaining distance, and also through metal screens.
The testing of such products is not concerned first and foremost with the emission of electrosmog, but with quality features such as brightness, light quality and energy saving. Even if the quality of LED bulbs has significantly improved, testing has shown that they are not yet perfect. It is a fact that LED bulbs continue to emit higher electromagnetic radiation than is allowed in computers. This is therefore making an unnecessary problem that could be reduced with technical solutions – as has already been the case with computer screens.
In the video, the values of LED bulbs in various frequency ranges are shown in detail.