Back to overview

What is Lumen/Watt ratio? And why is it important?

Understanding the Lumen/Watt ratio is becoming increasingly important when choosing the right products. This ratio plays a role in determining the efficiency of a light source and has direct implications for both energy consumption and lighting quality. In this article, we take a closer look at what the Lumen/Watt ratio means, why it is important, and the difference between LED lighting and traditional lighting.

What is the Lumen/Watt ratio?

The Lumen/Watt ratio is a measure of how efficiently a lamp produces light relative to its energy consumption. It is expressed as the number of lumens (light output) a lamp produces per watt of electrical power it consumes. In other words, it indicates how much light a lamp produces per unit of energy it consumes. A higher ratio means that a lamp produces more light with less energy, indicating higher efficiency.

Why is the Lumen/Watt ratio important?

This ratio is important for several reasons. First, it says something about the energy efficiency of the product. High energy efficiency means that a greater portion of the energy is used to produce light, and not lost to heat, for example. This leads to lower energy consumption and lower energy costs in the long run. A win-win situation!

By choosing lighting with a higher Lumen/Watt ratio, you can save money on your energy bills as an individual as well as a business. Although these lamps may have a higher initial purchase price, they can provide significant cost savings in the long run through lower energy costs.

Finally, the Lumen/Watt ratio also affects the lighting quality of the product. Lamps with a higher ratio generally produce brighter and more even light, improving the overall lighting in a room. This contributes to a more comfortable environment.

In developing our own products, we strive for the highest possible Lumen/Watt ratio. We do this by constantly innovating our products with better and more efficient light sources.

The difference between traditional and LED lighting

LED lighting is known for superior energy efficiency, with a much higher lumen/watt ratio than traditional lighting. This means that LED bulbs produce more light with less energy, making them not only more cost-effective, but also more environmentally friendly.

For example, a standard incandescent lamp usually has a Lumen/Watt ratio of about 10-17, while an LED lamp can easily reach a ratio of 80-130 or even higher. This huge difference in efficiency makes liver lighting a standard choice for both store lighting and office lighting as well as residential lighting. With our handy savings calculator, you can easily calculate your energy savings when you switch to energy-efficient LED lighting.

How is the ratio measured?

The Lumen/Watt ratio is measured by dividing the number of lumens of a lamp by the electrical power consumed by the lamp, expressed in watts. This measurement can be done in laboratories with specialized test equipment that can accurately record a lamp’s light output and energy consumption.

The process involves placing the lamp in a controlled environment and measuring the amount of light it produces at a set power level. The ratio is then calculated by dividing the light output by the energy consumption, giving a value that indicates the efficiency of the lamp.


The Lumen/Watt ratio is an important measure of lighting efficiency and plays an important role in choosing the right products. By understanding what this ratio means and how it affects energy consumption and lighting quality, you can make informed decisions and enjoy the benefits of energy-efficient LED lighting. Wondering which products are right for your project? Contact one of our lighting experts without obligation.

Submit a project?

We are happy to take on the challenge!

Curious about what we can do for you? Contact us or leave your details, we will get back to you within one working day.

Maurice Arons