It replaced and superseded several standards, including the older RP-8-14 (Roadway Lighting), RP-20-14 (Parking Facilities), and RP-22-11 (Tunnel Lighting). Methodology Shifts:
IES RP-8 is periodically revised. The next version (RP-8-25 or RP-8-26) is likely in development. To stay informed: ansi ies rp-8-18 pdf
, which measures light hitting a vertical surface (like a person walking). Standard Norge It replaced and superseded several standards, including the