all you can do is read up on that issue learn what you can and make your best judgment call on any monitor from its reviews , specs or end user reviews
go to a store the has one on working display and play around with it and its settings and see with your own eyes [ reasons I all ways buy a monitor or tv in store never mail order site unseen ]
just google monitor or hdtv backlight bleed and start reading up
http://www.tested.com/tech/584-how-to-spot-5-common-defects-in-your-lcd-warning-cannot-unsee/
https://www.monitornerds.com/backlight-bleed-ips-glow-pixel-dead-stuck-pixel/
to get you started
one more thing is how the manufactures set up the backlighting in the unit as well [how there mounted...