10 Myths and Fairy Tales about Leds – the Fact Check

To the energy-saving LED (light-emitting diode, also light-emitting diode) still count many prejudices still today. It is not bright enough, for example, emits cold light or is even harmful to health.
This is long past. With the 10 most popular myths and fairy tales, we clear up on LEDs and show you what the LED really does.

10 Myths and Fairy Tales about Leds - the Fact Check

1. Myth: Leds Have an Unnatural Color Reproduction

The opposite is the case. LEDs can reproduce almost realistically true colors. This is measured with the color rendering index CRI (Color Rendering Index). A very good color reproduction is said when all spectral colors are included as in sunlight. Then the colors of the illuminated object look natural. Sunlight has a CRI of 100, a white LED is between 70 and 95, a sodium-vapor high-pressure lamp has a value of -44. The lower the CRI, the worse the colors are reproduced – the higher, the more comfortable the colors are reproduced for the human eye.

Tip: the CRI can be increased by avoiding the use of “warm-white” LED bulbs. Here at allpubliclibraries you can get more led models. 

2. Myth: Leds Are Not Environmentally Friendly

LEDs even contribute to a reduction in CO² emissions, since they have a very low energy requirement. Since LEDs also do not contain mercury, they are much more environmentally friendly compared to other energy saving lamps.

3. Myth: Leds Need Eternity until They Light up

Is not right, because the LEDs have an immediate start. Unlike other energy saving lamps, they are 100% instantaneous. That can not even the light bulb.

4. Myth: Leds Are Expensive and Therefore Do Not Save Money

LEDs are actually more expensive than conventional light sources. However, their commitment pays off under cost aspects. The cost of ownership is not the cost, but the total operating costs, including long-term energy consumption and maintenance costs.

5. Myth: Dimming Leds Shortens the Lifetime

This myth also does not correspond to the truth. Solid built LEDs can be dimmed continuously and without any negative effects on their lifetime. By dimming, the amount of light that hits a certain surface can be varied continuously – provided the luminaires have integrated control elements. This is one of the most effective strategies for energy efficiency and therefore a dimming function should be integrated into each luminaire in order to achieve maximum savings.

6. Myth: Leds Are Too Light or Not Bright Enough

Depending on the LED light, there are very large differences in the options for luminous flux, optics, bundling and color temperature. Well-designed LEDs provide the right light output – the design and assembly of the LEDs play a key role.

7. Myth: Leds Are Poisonous

Do LEDs actually contain toxic mercury? No. LED bulbs are free of mercury and comply with European directives 2002/95 / EC.

8. Myth: Leds Generate Electrosmog

Most of the radiations are not the LEDs, but the halogen lamps. LEDs are operated with almost no-radiation direct current. They do not flicker and are as low-radiation as incandescent lamps.

9. Myth: Leds Are Energy-Intensive in Production

For the production of an LED, about 4.1 KWh more is required than with a light bulb. But one LED lasts for 25 years – the light bulb just takes it to 42 days. So the LED is in the forefront of life cycle assessment: compared to the consumption of electricity over the entire service life, the production energy is less than 5%.

10. Myth: Leds Do Not Function Properly at a High Ambient Temperature

The quality of the luminaire plays an important role here. In temperature tests from independent laboratories, LEDs have performed just as well as fluorescent lamps. A prerequisite for lighting at any temperature is the careful control of the heat dissipation. An important indicator of the quality of the temperature management of an LED solution is the junction temperature. It measures the internal temperature of the LED chip inside the luminaire for specific operating intervals – usually 6,000, 10,000 or even 18,000 hours.