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Low Blue Light Technology reduces the emission of the harmful low-blue lights on a display in order to prevent eye fatigue.
If you spend a lot of time in front of a desktop monitor, whether for entertainment purposes or work (or both!), you’re most likely concerned about your ocular health – as you should be.
Looking at the screen for extended periods of time without taking breaks can cause eye fatigue and headaches as well as leave a negative impact on your eyesight in the long run.
Luckily, most modern monitors have ways of preventing this and the Low Blue Light (LBL) technology is a very important one.
What Is Low Blue Light Technology?
In short, displays with the LBL technology filter out the harmful blue lights which can cause eye strain to those sensitive to it.
Another common symptom users experience is having trouble falling asleep prior to being exposed to this low blue light.
Basically, all modern monitors have a low blue light filter. You will find it in the display’s OSD (On-Screen Display) menu; look for a feature called ‘Low Blue Light’ or something along those lines.
Some monitors will apply the low blue light filter to certain pictures presets such as Reader Mode, Text Viewing, Paper, and similar.
Depending on the monitor, enabling the LBL mode/preset may or may not also change the screen’s brightness. If it does not, keep in mind that using optimal brightness setting is also crucial for a comfortable viewing experience.
In dim-lit rooms, you should decrease brightness, and increase it if you’re in a room with plenty of light.
Lastly, in case you have an older monitor which lacks Low Blue Light Technology, you can manually decrease the output of blue color in the monitor’s color temperatre settings.
Other Things To Keep In Mind
Besides having a low blue light mode, make sure the monitor you’re buying also has a flicker-free backlight.
Flicker-free monitors use direct current (DC) to dim their backlights. Displays that use PWM (Pulse-Width Modulation) to regulate brightness introduce screen flicker which can cause headaches to those sensitive to it.
Further, a monitor should have a proper anti-glare screen coating to eliminate reflections. Learn more about different screen surfaces and coatings.
Naturally, even with all these means of protection, it’s still recommended to take breaks; even a short 5-minute break after every hour or so is very beneficial.
If you have an older display with none of the features mentioned so far, you should consider getting a pair of blue light blocking glasses or a blue light screen protector which you can attach to your monitor.
Using Low Blue Light Technology will obviously impact the image quality, so if you’re playing a game or watching videos, you’ll certainly want to turn it off which is understandable.
However, when reading, typing, or using the monitor prior to going to bed, we recommend you try out different LBL settings. It might look weird or unhelpful at first, but after a while, you’ll notice that your eyes feel more comfortable.
We have a dedicated best monitors for office work buyer’s guide which consists of all types of displays that feature the LBL, flicker-free, and anti-glare technologies.
Some monitors such as the BenQ EW3270ZL have innovative eye-care features such as built-in sensors that automatically change the display’s brightness and color temperature according to ambient lighting and time, etc.
Rob is a software engineer with a Bachelor’s degree from the University of Denver. He now works full-time managing DisplayNinja while coding his own projects on the side.