Lighting standards and recommendations vary dramatically across different work environments. For instance cibse recommends at least 500 lumens for general office spaces used for computer reading and filing activities.
In office areas with system furniture assume that under cabinet task lighting is used and provide general illumination of about 300 lux 30 footcandles on the work surface.
Office desk lighting levels. Lighting zone 3 urban 1 5 75 3 8 4 1 6 lighting zone 2 suburban 1 0 5 2 6 3 1 2 gas station canopy 12 5 10 15 safety building exterior 1 0 5 2 if security is an issue raise average level to 3 retail general retail ambient 50 department store 40 20 80 15 7 5 30 perimeter 75 35 150. The us general services administration provides lighting levels and lpds for us government buildings which can be used as a guide for other types of buildings. A footcandle fc the most common unit of measure used for quantifying light levels is a measure of illuminance with one footcandle being equal to one lumen per square foot.
Today the light level is more common in the range 500 1000 lux depending on activity. These standards offer methods of maximizing lighting effectiveness for the functions and demands of the specific workplace setting through optimized initial design principles as well as guidelines for system upgrades. The table below provides recommended light levels from the iesna lighting handbook and lpd levels from the iecc 2015.
For precision and detailed works the light level may even approach 1500 2000 lux. 300 500 lux. Earlier it was common with light levels in the range 100 300 lux for normal activities.
However lighting levels may vary by the type of activity within the office. Ceiling lighting branch circuit capacity however should be sufficient to provide levels in table 6 3 for occupancy changes. Workplace specific lighting standards.
If your home office has multiple workstations for example a desk for computer and phone work a filing area and a table for reviewing photos and layouts set up dedicated task lighting for each station. An adjustable or articulated desk lamp can put light exactly where you need it and support a variety of tasks. Ies recommended light levels.
Check your local jurisdiction for other or more stringent requirements. The hse recommends that an office or large space such as a process control room be lit at an illuminance of 300 lux. 300 500 lux.
Recommended lighting level area recommended lighting level. General lighting should only be used either when the workplace is empty or when the consideration of shadows cast by equipment does not hinder the work. The illuminating engineering society ies has established recommended average maintained footcandle levels for a broad range of applications to ensure adequate illumination and safety for occupants.