Test results brightness from different viewing angles
The brightness from different viewing angles indicates how well you can see the display when you're not sitting directly in front of it. TN panels always suffer from discolouration, while IPS and VA display have less of a problem with this. Horizontal values of more than 47 percent are good, and above 50 percent it's very good. Vertical values above 10 percent are reasonable, above 15 percent are good, and above 20 percent very good.
Brightness from 45-degree horizontal viewing angle
The Philips Gioco 278G4DHSD has a brightness of 49 percent here, which is very good.
Brightness from 45-degree vertical viewing angle (from above)
From above 23 percent is very good, as good as the ASUS MX279, but the LG monitor was even better.
Brightness from 45-degree vertical viewing angle (from below)
From below the brightness is also very good, and even if it's slightly less than that of ASUS and LG, it's so minute it's not a deciding factor.