Lumen
simply explained The number of lumens is a characteristic of light sources and luminaires with permanently installed LEDs. This value provides information about the brightness of modern light sources and thus replaces the watt, which is the usual comparative value for incandescent lamps.
Watts or lumens? - That is the difference
Watt provides information about the energy consumption of a light source, lumen about the brightness. The reason why watts were used in the past was that the ratio of watts to lumens (the so-called luminous efficacy) was always the same for incandescent lamps. However, as light sources are becoming more and more efficient, they now produce more and more lumens per watt. However, this means that Watt no longer makes any statement about the brightness. This is because how many lumens a light source produces with how many watts depends on the product. Lumen, on the other hand, is a reliable value for determining brightness.
The energy-saving formula: More lumens - fewer watts
As lamps and light sources become ever better and more energy-efficient, they offer great potential for savings. Anyone choosing a new light source today will opt for LEDs - the most energy-efficient light source on the market. Anyone interested in the smart home will find smart LED lamps an easy introduction to the world of intelligent lighting control and individualization.
Top lamps for every socket
How do I convert to LED?
Beloved luminaires that were operated with incandescent lamps, halogen or energy-saving lamps can easily be fitted with a suitable LED light source. LED lamps have the same base as conventional lamps, e.g. E27, E14, GU10 or G9.
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FAQ: All about Lumen
Lumen (lm) is the unit for luminous flux, i.e. the brightness of a lamp. Light bulbs also had lumens, but it was customary to think in watts. This is no longer possible today because the ratio of watts to lumens is no longer regular with modern lighting technologies such as LEDs.
The lumens are printed on all lamp packaging. It also provides a comparative value that helps when comparing the luminous flux with a conventional incandescent lamp. Both can of course also be found in the Lampenwelt.de online store.
This basically depends on the place of application and personal preference. If you like your rooms bright, you should aim for a guideline value of 100-150 lumens per m². Reading corners or quiet zones often look particularly cozy with fewer lumens or dimmed light. Only in professional lighting applications such as in public facilities, restaurants, hotels, schools, parks or supermarkets are brightness values regulated by standards and binding.
Today, light sources are compared on the basis of lumen. If you want to compare LEDs & Co. with the wattage of incandescent lamps, you need to know how many lumens the old light bulbs had:
- 100 watts = 1521 lumens
- 75 watts = 1055 lumens
- 60 watts = 806 lumens
- 40 watts = 470 lumens
- 25 watts = 249 lumens
Modern light sources such as LEDs produce the same brightness with fewer watts - the luminous efficacy is higher. However, the ratio is very product-dependent and today ranges up to 200 lumens per watt for the latest generation of LED lamps with energy efficiency class A.
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