29 CFR §1926.26
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Construction areas, aisles, stairs, ramps, runways, corridors, offices, shops, and storage areas where work is in progress shall be lighted with either natural or artificial illumination. The minimum illumination requirements for work areas are contained in subpart D of this part.