GB/T 35626-2017 PDF English
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Specification for Limitation to Obstructive Light of Outdoor Lighting
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Basic data | Standard ID | GB/T 35626-2017 (GB/T35626-2017) | | Description (Translated English) | Specification for Limitation to Obstructive Light of Outdoor Lighting | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | K70 | | Classification of International Standard | 29.140.99 | | Word Count Estimation | 10,137 | | Date of Issue | 2017-12-29 | | Date of Implementation | 2018-07-01 | | Regulation (derived from) | National Standards Bulletin 2017 No. 32 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | GB/T 35626-2017: Specification for Limitation to Obstructive Light of Outdoor Lighting---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT35626-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.140.99
K 70
Specification for Limitation to Obstructive Light of
Outdoor Lighting
ISSUED ON: DECEMBER 29, 2017
IMPLEMENTED ON: JULY 1, 2018
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3
Introduction ... 4
1 Scope ... 5
2 Normative References ... 5
3 Terms and Definitions ... 5
4 Urban Environment Brightness Division and Obtrusive Light Classification .. 6
5 Limitation Requirements ... 7
6 Restrictive Measures ... 13
7 Test Methods ... 13
Specification for Limitation to Obtrusive Light of
Outdoor Lighting
1 Scope
This Standard specifies urban environment brightness division, obtrusive light
classification and the limitation requirements and measures of obtrusive light related
to obtrusive light of outdoor lighting.
This Standard is applicable to limitation requirements for obtrusive light of urban roads,
residential buildings, outdoor public activity areas and natural ecological areas, etc.
2 Normative References
The following documents are indispensable to the application of this document. In
terms of references with a specified date, only versions with a specified date are
applicable to this document. In terms of references without a specified date, the latest
version (including all the modifications) is applicable to this document.
GB/T 2900.65 Electrotechnical Terminology - Lighting
CJJ 45 Standard for Lighting Design of Urban Road
JGJ/T 163 Code for Lighting Design of Urban Nightscape
3 Terms and Definitions
What is defined in GB/T 2900.65, and the following terms and definitions are applicable
to this Standard.
3.1 Spill Light
Spill light refers to the light shining outside the scope of the illuminated target.
3.2 Obtrusive Light
Obtrusive light refers to the light that causes people’s annoyance, discomfort,
distraction or reduced ability to view important information (for example, traffic signals)
due to its quantity or direction characteristics.
3.3 Light Pollution
Light pollution is a general term for the sum of various adverse effects of artificial light.
c) Light pollution to the night sky: the light of lighting device directly shines into
or is reflected into the night sky, affecting astronomical observation;
d) Obtrusive light to motor vehicle road traffic: various non-road lighting devices
around the road cause glare effects on motor vehicle drivers, resulting in a
decrease in their visibility;
e) Obtrusive light that affects public activity areas (such as: urban squares and
pedestrian streets, etc.), natural ecological areas and animal habitat areas.
4.2.3 In accordance with the source of the obtrusive light, it may be divided into the
following categories:
a) Obtrusive light generated by advertisements, signs or display screens: the
surrounding environment and people’s lives are affected due to inappropriate
brightness, colors, flickers and excessive overflow light of advertisements,
sign lighting or display screens;
b) Obtrusive light generated by landscape lighting: the surrounding environment
and people’s lives are affected due to inappropriate brightness, colors, flickers
and excessive overflow light of landscape lighting;
c) Obtrusive light formed by the overflow light of functional lightings, such as:
road lighting and outdoor worksite lighting, etc.
5 Limitation Requirements
5.1 Limitation of Obtrusive Light in Residential Areas
5.1.1 The limitation of obtrusive light in residential areas shall be evaluated through the
vertical illuminance limit on the outer surface of the windows of residential buildings
and the luminous intensity limit of the luminaire facing the windows of the living rooms.
5.1.2 The vertical illuminance limit of the outer surface of the windows of residential
buildings shall not exceed the stipulations of Table 2.
5.5 Limitation of Obtrusive Light to Urban Public Rest Areas, Natural
Ecological Areas and Animal Habitat Areas
5.5.1 Lighting fixtures installed on the waterside of urban rivers and lakes shall prevent
the direct light and reflected light from the water surface from affecting road users and
surrounding residential buildings.
5.5.2 The limitation of obtrusive light of urban park road lighting fixtures to pedestrians
should comply with the stipulations of 5.2; the lighting of public activity areas shall not
affect the environment beyond the areas.
5.5.3 In urban forest parks, in addition to safety precaution lighting and pedestrian
walkway lighting, other lightings shall not be installed; lighting facilities shall be
prevented from illuminating surrounding trees; luminaires with an upward luminous flux
of 0 shall be used.
5.5.4 Landscape lighting should not be set up in nature reserves.
5.5.5 The lighting of plants shall comply with the following requirements:
a) Landscape lighting shall not be installed on rare trees; landscape lighting
facilities installed around them shall not affect rare and ancient trees;
b) Normal landscape lighting should not be installed for ordinary trees;
c) Lighting fixtures should not be installed on trees; lighting fixtures installed
around trees shall not affect the growth of the branches, leaves and roots of
the trees.
5.5.6 Landscape lighting should not be installed in animal habitat areas and related
protection areas. When setting up lighting in places where animals or insects might
show up, light sources that have a series impact on animals and insects shall not be
used.
5.6 Limitation of Obtrusive Light of Advertisements and Sign Lighting
5.6.1 The limitation of obtrusive light of advertisements and sign lighting shall be
evaluated through the average brightness limit of the light-emitting surface of
advertisements and signs.
5.6.2 The maximum allowable average brightness of the light-emitting surface of
advertisements and signs shall not exceed the stipulations of Table 6.
6 Restrictive Measures
6.1 The lighting design shall be based on the area and the characteristics of the
illuminated object, and the demands for lighting. In addition, it shall comply with the
requirements of relevant national and industry standards.
6.2 During the design of outdoor lighting, analysis and evaluation of the influence of
obtrusive light shall be conducted on potentially obtruded objects.
6.3 The dynamic pattern, frequency of change, color parameters, spectral power
distribution and intensity of landscape lighting shall be coordinated with the
environment. Except for the commercial areas, and culture and entertainment areas,
dynamic lighting facilities that frequently change patterns should not be set up.
6.4 During the design of landscape lighting for building facades with mixed reflection
characteristics, when the specular reflection component of the wall reflectance
exceeds 50%, the mode of flood lighting should not be adopted.
6.5 The limitation of obtrusive light of urban squares or pedestrian street lighting shall
comply with the requirements of relevant stipulations in JGJ/T 163.
6.6 When the mode of flood lighting is used for landscape lighting, the spill light shined
beyond the illuminated area shall comply with the requirements of relevant clauses in
JGJ/T 163.
6.7 The spill light of urban outdoor worksite lighting shall not be greater than 15%.
7 Test Methods
7.1 The obtrusive light in the residential area shall be measured through the vertical
illuminance limit on the outer surface of the windows of the living rooms of residential
buildings and the luminous intensity limit of the luminaire (after being installed in place)
facing the windows of the living rooms.
7.2 The obtrusive light of the sidewalk shall be measured through the maximum
average brightness between the 85° and 90° directions of the luminaire and the
downward perpendicular, and the total light-emitting area of the luminaire between the
85° and 90° directions from the downward perpendicular.
7.3 The light pollution of the night sky shall be measured through the upward light
output ratio of the luminaire. The upward light output ratio of the luminaire is obtained
by measuring the luminous flux of the luminaire shined above the horizontal plane with
the position of the luminaire in on-site installation and usage.
7.4 The obtrusive light of advertisements or signs shall be measured through the
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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