Buying tips for LED lamps

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LED lamps - THE alternative to incandescent and halogen lamps

LED lamps with micro switches by China Micro Switch Manufacturer (light-emitting diodes - LED stands for Light Emitting Diode) are the longest-lasting and most energy-efficient alternative to incandescent and halogen lamps and are now suitable for almost any application. They use up to 90 percent less electricity than incandescent lamps and over 70 percent less than halogen incandescent lamps. Depending on the model, they last up to 25 years. (This lifespan is based on the assumption of 1000 operating hours per year, ie 2.74 hours per day.) They are available in all light colors from warm white (corresponds to the light of an incandescent lamp) to neutral white and daylight white. Depending on the model, they are also dimmable. The start time is comparable to that of incandescent lamps. It is less than a second.

1. The more often a lamp burns, the more worth exchanging

Identify the greatest savings potential of your lighting. The greatest savings are achieved when you replace lamps that are switched on for a long time every day and have a high wattage. For example, a 60-watt light bulb requires 66 kWh of electricity per year with a daily burning time of three hours. That is 19 euros per year (Ø electricity price: 29.16 Ct / kWh, electricity price analysis February 2017 by the Federal Association of Energy and Water Management eV). An equivalent LED lamp manages with the same burning time with 9 kWh of electricity per year and therefore only costs 2.60 euros in electricity costs.

Where you have identified the greatest savings potential , you should start replacing the lamp! Here, the purchase price pays for the LED lamp by the significantly lower power consumption and much longer life usually already within the first year.


2. Buy the right lamp

Make a note of the following four points for each lamp and get advice in the store of your choice which LED is the right one. If you are unsure, simply take your disused lamp with you for advice. If you shop online, check the respective lamp properties before ordering.

·         Sockel-Typ (E27, E14, GU10, etc.)

So that you do not experience a nasty surprise at home, you should take a look at the base of the lamp before buying it. The bases E27 and E14 with rotating thread are often used in luminaires. Spotlights (also called spots or reflectors) are often plug-in bases, such as GU5.3.

·         Lamp shape and size (consider candle shape, teardrop shape, spot, length and width in cm if necessary) :

Due to their built-in cooling, LED lamps are sometimes larger than your old lamp. Please note how big your new LED can be.


·         Choose the right brightness (lumens)

The brightness of a lamp is measured in lumens. It stands for the luminous flux that a lamp emits. The higher the lumen value of a lamp, the brighter it shines. An equally high lumen value for different lamps stands for an equally strong brightness. This value is usually not indicated on the lamp itself - regardless of whether it is an incandescent, halogen or energy-saving lamp. However, this value is always stated on the sales packaging. With incandescent lamps, you can use the wattage on the lamp to find a correspondingly bright LED replacement (see graphic).

Our recommendation: Select the brightness according to the purpose for which you want to use the lamp. However, always prefer models with a good luminous efficacy (lumens per watt; Lm / W): the brighter a lamp (luminous flux in lumens) with the same wattage, the more efficient it is .


Graphic: Comparison of watts and lumens of light bulbs and LED lamps


·         Choose the light color depending on the area of ​​application:

You can recognize the light color by the color temperature in Kelvin specified on the package: the higher the color temperature, the higher the proportion of blue in the light. Which light color you prefer is a matter of taste, but for many consumers the following applies:

  • Warm white or extra warm white light(approx. 2500 - 3500 Kelvin) is suitable for the cozy part of the apartment, e.g. living room, bedroom and children's room.
  • Neutral white(approx. 4000 Kelvin) for the kitchen and hall.
  • Daylight or cold white(approx. 6500 Kelvin) is more suitable for work areas such as the office or study.


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