Seoul sets first-ever national standards for LED billboard brightness to reduce glare and improve urban lighting (Seoul Metropolitan Gov’t)

Recommended Standards for Outdoor LED Displays (Draft) cap daytime brightness at 7,000 cd/m2 based on on-site measurements. Separate brightness limits established for daytime and nighttime, with nighttime standards set at one-third of current legal limits depending on screen size. New standards took effect on Wednesday, April 1, and are expected to reduce energy consumption by approximately 15%. […]