If its coming from the corners that is IPS glow. BLB generally comes from the edges of the monitor between the corners. ISP glow is very common for these monitors but will very on intensity from monitor to monitor. Also adjusting the brightness level to your desired user level will make a difference. For example if I set my brightness up to 100% the ISP glow is pretty bad but I would never run my monitor at 100%. I play in a very dark room so I set mine to 30% and at that level I see no ISP glow at all.