LEDs are becoming increasingly popular. Their design and operation ensures unbeatable high energy efficiency, which is why the LED has now also overtaken the energy saving lamps. However, there are also some differences in LEDs that should be considered: energy consumption, luminosity or color. The information on the packaging must be understood in order to find the correct LED. That is why today we show you what exactly the packaging information in the form of symbols or numbers means.
1. Lumen = Luminosity
Lumen is the key value for the brightness of an LED. Contrary to the good, old Wattzahl, lumen describes the brightness much better. The value indicates the amount of light that a lamp actually emits. Today’s wattages of modern light sources are significantly lower than with conventional light bulbs. On the packaging are often only values between three and nine watts. This is due to the fact that modern lighting technology consume much less electricity. The wattage of modern lighting fixtures therefore has hardly any meaning in terms of the brightness to be expected. If you miss the old unit of measurement, the conversion of lumens into watts is usually indicated on the packaging.
Think about the purpose for which you want to use the space and what atmosphere it should have. For more information on the topic, please read our blog post .
2. A To E = Power Cable
The energy efficiency of light sources must be characterized in the European Union. These energy cables are based on strict criteria and reach the best possible classification A ++. LEDs are generally class A to A +, halogen lamps and incandescent lamps are class B or C. Since 2016, class C luminaires are no longer allowed to enter the market.
3. From Warm To Cool = Light Color
Some manufacturers have already developed their own descriptions for the light color of an LED buld. They offer the buyer a faster orientation on the packaging.
4. K = Color Temperature
If there is no description of the light color, pay attention to the Kelvin value (K). It specifies the color temperature and thus also the light color.
2,700 to 3,300 Kelvin characterize warm white light
Ideal for the office is neutral white light up to 5,300 Kelvin
Daylight white light from 5,300 Kelvin has a particularly high blue color. This has an advantage: it makes us bright in the morning.
5. Ra = Color Reproduction
Have you ever seen a red-lit room that does not recognize red? Red is reproduced in red light. This has something to do with the color reproduction of a light source, which is described in an index. Behind the abbreviation “CRI” is the English term “Color Rendering Index”, which means in German “color rendering index” (Ra). Sunlight and incandescent lamps reach an Ra value of 100. This means that they contain all the spectral colors in the same distribution and thus reproduce the color of objects particularly naturally. A lamp with this property has at least a value of 90 Ra.
6. Percent = Luminous Intensity
The percentage indicated on the packaging indicates how many seconds (s) the lamp reaches its full luminous intensity (%).
7. Checkmark = Dimmability
Not every LED is dimmable. Dimmable LEDs are indicated by the check mark next to the dimmer symbol.
8. H = Service Life
The service life of an LED is usually indicated in operating hours. Lifetime describes the time to the voltage drop to 70 percent (luminous flux goes back). There is the rule of thumb: in the living room (living room, kitchen or bathroom) a light is about 1,000 hours per year. For offices, an average of 2,400 operating hours per year, equivalent to 10 hours per working day. For rooms such as storage room, hall, bedroom or guest WC, an average of 180 operating hours per year is calculated.
9. Hg = Mercury
Small quantities of mercury are usually necessary to produce efficient lamps. In contrast to other light sources, LEDs contain hardly any mercury. On the packaging you can recognize the mercury content of the LED with the value Hg (chemical name for mercury).
10. E = Thread Identification
In order to find the right LED light for the thread, you must know the thread size – because your bedside lamp may need a different thread than your living room light. The shape and name of the Edison thread, which is common in Europe, goes back to Thomas Alva Edison. Thus, the thread designation is “E”, followed by the outside diameter of the thread in mm. E27 corresponds to a large thread, while E14 corresponds to a small mount.
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