Backlight bleed and IPS glow explained

How to tell normal glow from a panel worth returning.

What it is

Backlight bleed is light leaking around the edges of an LCD panel, most visible on dark screens. IPS glow is a silvery sheen that changes with viewing angle. Some glow is normal for IPS; heavy bleed that doesn't change with angle is a defect.

How to test

In a dim room, show a full black image at about 50% brightness. Look straight on from a normal distance, then move your head. Glow shifts as you move; bleed stays put.

Test at your normal brightness, not 100%
Compare the corners
Check again after loosening the bezel screws slightly (on monitors where that's safe)