What does Lumen to Watt mean? | Lumens to Watts in lighting
When we want to know the light output of a light source, we look at the Lumen value. Lumen indicates the amount of visible light emitted by a light source in all directions. The symbol for this is lm.
A common misconception is that we look at the wattage (W) for the amount of light that is emitted. However, wattage nowadays represents the energy consumption of a bulb or a fixture. Previously, the wattage did indicate the light output of, for example, incandescent lights. In this case a higher wattage usually meant a higher light output. With the introduction of newer technologies such as LED, bulbs started to consume less and less energy to achieve the same light output as their conventional predecessors. So by focusing on the Lumen value and comparing it to the conventional lighting you want to replace, you can be assured that you will get the same light output, but then far more efficient!
To make the comparison a little easier, we have drawn up a chart below that shows you exactly which wattage is in line with which amount of lumens. Moreover, it immediately shows the difference in energy consumption, between the various lighting technologies, when looking at a specific amount of lumens:
From Lumens to Watts *
*Click on the wattage you need and take a look at our assortment!
How many lumens do I need?
We have now given you a handy chart that shows you how different Lumen values translate to Watts. Suppose you now want to equip your room with lighting; how strong should the light be? It is often difficult to determine this, given that every room is different in size. However, we can solve this easily by consulting the Lux value. 1 Lux represents the amount of light falling at one metre from the source. If you multiply this by the number of square metres of your room, you get the Lumen value suitable for your space! Below we have compiled a list of a few locations and common Lux values:
- Residential: 200-500 Lux
A home consists of several types of rooms. In the kitchen, for example, you need enough light to safely handle sharp or hot objects such as knives and the cooker. Here, a Lux value of 300 would not be misplaced. The same goes for the bathroom, for example, where you are busy with hygienic tasks.
- Work space: 450-500 Lux
In the workplace, such as the office, you need sufficient light to promote comfort and productivity. Enough light ensures we stay awake and put as little extra strain on our eyes as possible.
- Retail: 700-1500 Lux
In retail, light levels can vary a lot depending on the placement and function. For example, you would want all of your products to be displayed as well and as clearly as possible. Therefore, retailers such as jewellers and shop windows require a high amount of light.