Author Topic: LG 27UL550 Review: Matte 3840x2160 LG AH-IPS with AMD Free-Sync  (Read 6938 times)


  • Administrator
  • Hero Member
  • *****
  • Posts: 758
    • View Profile
Back-Light Bleed @140cdm/2

LG 27UL550 Back-Light 25s by Dr NCX, on Flickr

I set my monitors to output 140cdm/2 when displaying pure white, and use them with a 2200 lumen ceiling light or 5x LIFX BR30 lights.  I do not recommend using more than 80cdm/2 brightness when using displays in a light-less room.  The LG AH-IPS panel in the 27UL550 does not suffer from obvious back-light bleed, glow, or uniformity flaws, but it is not perfect since the top left and right corners are a tiny bit lighter, or higher measured black level than the rest of the panel.  Fortunately these minor imperfections are only visible when viewing the monitor in a light-less room with high brightness.

Acer XB321HK AHVA Panel with 800:1 Contrast
Spoiler (hover to show)

HP Spectre 32 AHVA Panel with 700:1 Contrast
Spoiler (hover to show)

Monoprice 274K or RTD2795 AHVA Panel with 1100:1 Contrast
Spoiler (hover to show)

Qnix UHD3216R AHVA Panel with 1100:1 Contrast
Spoiler (hover to show)

Viewsonic VP2780-4K LG AH-IPS Panel with 1000:1 Contrast
Spoiler (hover to show)
« Last Edit: June 20, 2019, 02:51:34 am by NCX »