How do watts compare to lumens

How to convert lumens to watts!

You want your lightbulbs through modern LEDs *change?

Conversion of lumens to watts

When do you actually have to convert lumens into watts or when can this be helpful? The conversion from lumens to watts using a comparison table can be particularly useful if you old bulbs in your apartment or house Replace with modern LED lamps * want.

When buying a lightbulb, it used to be easy to compare the light sources. The wattage was used for comparison. A 25 watt light bulb was darker than a 60 watt light bulb and if you had to replace a defective 60 watt light bulb, you could safely buy another 60 watt light bulb. The lamps were then immediately bright.

Bothmodern LED lamps * this is no longer so easy - the same wattage does not necessarily mean that the lamps have the same brightness. The power consumption, i.e. the wattage, is therefore rather unimportant, much more important is the specification and comparison of the Brightness of the lamp and with it the Number of lumens.

Here you will find all the important information about converting lumens and watts and vice versa in detail. First of all, it is important to once again explain the terms watt and lumen.


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What are watts?

The watt is the standardized unit for power. And the performance in turn indicates how high the energy consumption is per period of time. The unit was named after the Scottish scientist and engineer James Watt.

In the case of lightbulbs, for example, there was a connection between the wattage and the brightness of a lamp. The higher the wattage, the brighter the lamp. Due to the technical progress also in the lighting sector, modern LED lamps have such a low energy requirement due to their construction and their functional principle that this factor no longer affects the brightness of a lamp.

For this reason, a further value is required for a better comparison for modern light sources - namely lumen:

What are lumens?

Lumens - also like abbreviated lm - is the standardized one Unit for the luminous flux a lamp. This luminous flux describes the total light emitted by a lamp. In a very simplified way, you can remember that the higher the luminous flux or the lumen value, the more light is emitted by a lamp and the lamp becomes correspondingly brighter. In order to be able to compare the luminaires better, the lumen value on LED luminaires and lamps must be specified in the product description.


Lumens to watts comparison table

Now that just the two terms are cleared up, you can Lumens in watts convert and get a better overview of how you light your home. In the attached table, the bulbs and Led lamp* the halogen lamp and the energy-saving lamp are also listed. However, because of the environment, people would no longer buy energy-saving lamps, but only resort to modern LED technology.

powerLightbulbHalogen lampEnergy saving lampLED
5 watts180 lm500 lm
7 watts290 lm700 lm
9 watts400 lm850 lm
11 watts530 lm1200 lm
14 watts730 lm1500 lm
25 watts230 lm300 lm
40 watts430 lm500 lm
60 watts730 lm900 lm
75 watts970 lm1200 lm
100 watts1380 lm1700 lm

Example for converting lumens to watts:

How many lumens does a 60 watt light bulb have? Very simple: In the 2nd line of the table above you can see that a 60 watt light bulb has approx. 730 lm. If you want to replace this with an LED lamp of about the same brightness, submit LED lamps with 7-9 watts * - see column 5 in the lumen in watt comparison table.


How many lumens do you need for which room?

You want to re-plan the lighting and brightness for your room and, if necessary, install new lamps, or you are currently building and planning your room. But what are the specifications for the brightness of the respective rooms? There are only legal requirements for brightness at the workplace, all other values ​​are merely guidelines based on tests or recommendations from manufacturers.

As a general rule of thumb, you can remember or even think - it should be brighter in work rooms than in living rooms. In addition, the required use of light sources also depends on the general brightness of your rooms, i.e. brightly furnished rooms require less light than darkly furnished ones.

As you did in the above section on the subject Convert lumens to watts can read is the one needed Unit of measure for brightness, lumen. Therefore you can find the following recommendations for the basic lighting for the different rooms in the house on different platforms:

Recommendation for basic lighting per room:

  • Basic lighting living room / hallway 100 lm / m2
  • General lighting bedroom 100 lm / m2
  • Basic lighting in the kitchen / bathroom 300 lm / m2
  • Basic lighting of the study 250-300lm / m2

As the word basic lighting suggests, this should be the minimum lighting in the room. In addition, you can set light accents in the individual rooms with additional lights. Examples of this are for example Under-cabinet lights * in the kitchen, Mirror lights *in the bathroom or for example Reading lights* in living room or bedroom. In the study are particularly goodLED panels * suitable for lighting. This can then be done by professional Office lights *can be added.

But don't forget when choosing the right light source Light color. It is particularly recommended in living rooms warm white lights to install, as these give a more comfortable impression. In work rooms such as the kitchen you can like to cold white glow grab, these look cooler but also lighter.

For those who are unsure and do not want to commit themselves to the light color immediately, lights with dimmers or color-changing lights are ideal!

Example of lighting planning for a room

So that you can see what the replacement of old lamps with LED lamps means - you can see from the attached graphics:
LED panel with 560 lumens each

560 lm x 3 pieces = 1,680 lm 140 lm / m2


Halogen bulbs with 25W - 300 lm each

300 lm x 6 pieces = 1800 lm → 150 lm / m2


In any case, the change from conventional light sources to modern LED light sources should not be a quick fix. You should study and compare the key figures you need beforehand. Otherwise it can quickly lead to disappointment if, for example, the wrongly selected LED lamp is later darker than the previous halogen lamp.

To choose the right LED lamp, you should take the lumen value of the previous lamp as a starting point. In the table above you can then see what a comparable value is for an LED lamp. This way, there will be no disappointments later.