What screen brightness level is recommended for working

We spend hours in front of the computer, whether working, studying or simply browsing, but have you ever stopped to think about whether your screen is set up correctly? A monitor with inappropriate brightness can be more than just an annoyance: it can cause eye strain, headaches, postural discomfort and even affect your concentration. Setting the brightness correctly is one of the simplest things you can do to look after your health and improve your performance, and yet many people overlook it.

In this article you will discover how to find the ideal brightness for your environment and your tasks, and how small changes can make working in front of the screen much more comfortable and healthy.

How the computer screen brightness affects us

The screen brightness directly affects visual health. Brightness that is too high causes glare, dry eyes and a feeling of tiredness. Conversely, brightness that is too low forces you to strain your eyes, which also generates fatigue and can lead to headaches.

When the brightness is not right, the body tends to compensate with bad posture: getting too close to the screen, slouching or tilting the neck. This shows that monitor brightness is not just a visual matter, but is closely related to ergonomics at work.

In addition, a poor setup can affect your concentration and performance throughout the day, even if you have a quality office desk and a well-organised space. If your eyes are uncomfortable, the brain gets distracted more easily and performance drops. That is why adjusting the brightness is a simple action with a big impact on daily well-being.

What is the recommended brightness level for a PC screen

There is no single value valid for all users, since the perception of brightness depends on each person's eye sensitivity and on the lighting environment. However, general references can be established: for offices with standard lighting, the recommended brightness level is usually between 120 and 150 cd/m². In very bright environments, such as offices with large windows or direct natural light, it may be necessary to increase the brightness to 200 cd/m² or more. In spaces with little light, such as rooms at night, it is best to reduce it considerably so as not to strain your eyes.

A useful trick is to adjust the brightness so that the screen does not stand out either by excess or by lack compared with the environment. If the screen looks like a “torch” or reflects too much light, the brightness is too high. If you notice that you struggle to read small letters or make out details, it is probably too low. It is also advisable to alternate your gaze between the screen and distant objects to relax your eyes and prevent eye strain.

It is important to take posture into account. Correctly adjusting the height of the chair, the distance to the monitor and the position of the body helps to avoid discomfort, especially if you suffer from physical problems. Here you can see recommendations on how to sit with hip pain, which complement a good screen setup.

Finally, remember to check other screen parameters, such as contrast, colour temperature and blue light mode. These settings help reduce eye strain and improve the readability of texts, especially during long sessions in front of the computer. For example, adequate contrast makes it easier to read documents, while reducing blue light in the evening helps improve sleep quality by not interfering with the circadian rhythm.

Correctly adjusting the monitor brightness is one of the simplest and most effective ways to improve your well-being at work. Spending a few minutes setting the brightness according to your environment, your task and your posture can make a big difference to visual health, ergonomics and daily productivity. Combined with other screen settings and good ergonomic practices, appropriate brightness contributes to a comfortable, healthy and efficient work environment, allowing you to maintain your performance throughout the day without sacrificing your well-being.