10 MYTHS AND FAIRY TALES ABOUT LEDS - THE FACT CHECK

LEDS

Even today many prejudices circulate around the energy-saving LED (light-emitting diode, also known as a light-emitting diode). She was not bright enough, give off cold light or even harmful to health.
That is long gone. We clean up with the 10 most famous myths and fairy tales about LEDs and show you what the LED really can do.

1. LEDs HAVE AN UNNATURAL COLOR RENDERING
The opposite is the case. LEDs can reproduce colors almost faithfully. This is measured with the color rendering index CRI (Color Rendering Index). Very good color rendering is when all spectral colors are contained 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 high-pressure sodium vapor lamp has a value of -44. The lower the CRI, the worse the colors are rendered - the higher the more pleasing the colors are to the human eye.
Tip: the CRI can be increased by avoiding "warm-white" LED bulbs.

2. LEDs ARE NOT ENVIRONMENTALLY FRIENDLY
LEDs even contribute to a reduction in CO² emissions, as they have a very low energy requirement. Since LEDs also contain no mercury, they are much more environmentally friendly compared to the other energy-saving lamps.

3. LEDs TAKE FOREVER TO SHINE WHEN YOU TURN THEM ON
Not true, because the LEDs have an immediate start. They shine in contrast to other energy-saving lamps immediately with 100%. That can not even be the light bulb.

4. LEDs ARE EXPENSIVE AND THEREFORE SAVE MONEY
LEDs are actually more expensive to buy than conventional bulbs. Their use, however, pays off again in terms of cost. It's not the initial cost that counts, but the total cost of ownership, which includes long-term energy use and maintenance costs.

5. DIMMING LEDS SHORTENS THE LIFE
Again, this myth is not true. Solid LEDs can be dimmed steps and with no negative impact on their service life. Dimming allows infinite variation in the amount of light striking a particular surface - provided the lights have built-in controls. This is one of the most effective strategies for energy efficiency and therefore a dimming function should be integrated into each luminaire to achieve the maximum savings.

6. LEDs ARE TOO BRIGHT OR NOT BRIGHT ENOUGH
Depending on the LED luminaire, there are very large differences in the options for luminous flux, optics, bundling and color temperature. Well designed LEDs provide for the right light output - of course, the design and installation of the LED also play a key role.

7. LEDs ARE POISONOUS
Do LEDs actually contain toxic mercury? No. LED lamps are mercury-free and comply with European directive 2002/95 / EC.

8. LEDs GENERATE ELECTROSMOG
Most radiations do not emit the LEDs, but the halogen lamps. LEDs are operated with almost radiation-free direct current. They do not flicker and areas low-radiation as incandescent lamps.

9. LEDs ARE ENERGY INTENSIVE TO MANUFACTURE
For the production of an LED, about 4.1 kWh is needed more than a light bulb. But an LED holds for 25 years long - the light bulb just brings it to 42 days. So the LED is ahead in terms of life cycle assessment: compared to the power consumption over the entire useful life of the manufacturing power is less than 5%.

10. LEDs DO NOT WORK PROPERLY AT HIGH AMBIENT TEMPERATURES
The quality of the light plays a big role here. In temperature tests conducted by independent laboratories, LEDs have performed as well as fluorescent tubes. The 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 within the luminaire for specific operating intervals - typically 6,000, 10,000 or even 18,000 hours.

The values ​​are usually available as part of industry-standard tests conducted by independent testing laboratories. The results of these tests allow for reliable lifetime indications of the LED luminaires.

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