Light ergonomics
Light ergonomics is the relationship between the light source and the individual.[1] Poor light can be divided into the following:
- Individual or socio-cultural expectations
- Insufficient light
- Poor distribution of light
- Improper contrast
- Glare
- Flicker
- Thermal heating (over or under)
- Acoustic noise (especially fluorescents)
- Color spectrum (amber street lighting)
Effects of poor light
The effects of poor light can include the following:
-
Recommended Illumination Levels[2] |
Type of Activity |
Ranges of Illuminations (Lux) |
Public spaces with dark surroundings |
30 |
Simple orientation for short temporary visits |
50 |
Working spaces where visual tasks are only occasionally performed |
100 |
Performance of visual tasks of high contrast or large scale |
300 |
Performance of visual tasks of medium contrast or small size |
500 |
Performance of visual tasks of low contrast or very small size |
1000 |
Performance of visual tasks near threshold of person's ability to recognize an image |
3000-10000 |
Types of light sources
-
See also
References
- ^ "The Ergonomics of Light" by Bradford J. Powell, Buildings.com, October, 2002, retrieved November 3, 2007
- ^ Illuminating Engineering Society of North America. RIESNA Lighting Handbook. (9th ed.). Illuminating Engineering Society of North America. ISBN 0-87-995150-8.
- ^ "Lighting Ergonomics - General" by Canadian Centre for Occupational Health & Safety, CCOHS, January, 2003, retrieved November 3, 2007