ADMINISTRATIVE MEMORANDUM
COUNTY OF SAN MATEO
NUMBER: D-2
SUBJECT: Office Lighting Levels
RESPONSIBLE DEPARTMENT: General Services
APPROVED: County Manager
DATE: February 1, 1984
As part of the county’s ongoing energy management program, the following light levels have been established for all county facilities:
| Footcandles Illumination | |
| Normal office work (reading, writing, intermittent filing) | 50 +/- 10 |
| Office work requiring extensive filing, taking shorthand or frequent bookkeeping or drafting | 75 +/- 15 |
| Office work requiring extensive bookkeeping, drafting or other visually difficult critical tasks | 100 +/- 20 |
| Work and circulation areas surrounding work stations | 30 +/- 5 |
| Hallways and corridors | 10 +/- 5 |
| Restrooms | 20 +/- 5 |
| Outdoor security lighting | 0.5 +/- 2 |
These light levels have been established by the Illuminating Engineers Society. Work areas will be periodically surveyed to maintain these standards. Task lighting will be encouraged where increased illumination is required intermittently. Special circumstances requiring higher light levels should be called to the attention of the Energy Coordinator, Building Division, General Services Department.