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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