The Lighting Handbook
The Lighting Handbook
Your concise reference book
Chapter 1
Lighting technology
Chapter 2
Standard values for indoor and outdoor lighting
Based on the new European standards
Chapter 3
Lighting application
Chapter 4
Technology
Chapter 5
Lamps
Chapter 6
Lighting control and control gear
Chapter 7
Emergency lighting
Chapter 8
Technology and tables
Chapter 9
Design tools
Imprint For questions and suggestions on "The Lighting Handbook" Zumtobel Lighting GmbH Schweizer Strasse 30 Postfach 72 6851 Dornbirn, AUSTRIA T +43/(0)5572/390-0 info@
6th edition: April 2018
Chapter 1
Lighting technology
What is light? What does the human eye see? Human Centric Lighting Light has a triple effect
Basic parameters used in lighting Luminous flux Luminous intensity Illuminance Luminance
Quality characteristics of lighting The right light ? traditional and new quality criteria Illuminance ? definition of terminology Glare ? glare limitation The UGR method Illuminance levels on ceilings and walls Spatial illumination Light colour Colour rendering
Measuring illuminance
Outdoor lighting
Types of lighting
Lighting concepts
Energy efficiency in buildings
1
6 7 8 8 10 11 11 11 11
12 12 14 15 17 17 18 18 19 20 22 24 26
The Lighting Handbook
6
What is light?
Light is that part of the electromagnetic spectrum that is perceived by our eyes.The wavelength range is between 380 and 780 nm. The cones come on during the day and we see colours, whereas at night the rods take over and we only see shades of grey.
What is the melanopic effect of light? The retina also contains photosensitive ganglion cells. These are sensitive to blue light and suppress the sleep hormone melatonin at night. Melatonin is responsible for a good sleep at night. Suppressing melatonin in the morning helps keep you awake during the day. This means that the right light controls the circadian rhythm thus a healthy waking and sleeping behaviour.
What is light?
Wavelength [m]
10-10
Gamma rays
X-rays
Ultraviolet
Light
10-5
Infrared
Terahertz
Microwaves 100
Television, VSW
Medium wave Radio waves 105
The Lighting Handbook
7
What does the human eye see?
Relative spectral perception of brightness and melanopic effect
Effect as a percentage
Night Day Smel() V'() V() 100
80
60
40
20
0 380 420 460 500 540 580 620 660 700 740 780
Wavelength [nm]
Explanation of the three curves: V() = Perception of brightness, daytime seeing with the cones V'() = Night-time seeing with the rods Smel() = Melatonin suppression with the photosensitive ganglion cells
Wavelength [nm]
The Lighting Handbook
8 What is light?
Human Centric Lighting
Human Centric Lighting (HCL) expresses the positive effect of light and lighting on the health, well-being and performance of humans and thus has both short and long-term benefits.
Light has a triple effect
Light for visual functions ?Illumination of task area in conformity
with relevant standards ? Glare-free and convenient Light for emotional perception ? L ighting enhancing architecture ? Creating scenes and effects Light creating biological effects ? S upporting people's circadian rhythm ? Stimulating or relaxing
The Lighting Handbook
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