GB/T 9473-2022 English PDF (GB/T9473-2022)

GB/T 9473-2022: Performance requirements for table lamps for paper task
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GB/T 9473-2022
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.140.40
CCS K 72
Replacing GB/T 9473-2017
Performance requirements for table lamps for paper task
ISSUED ON. DECEMBER 30, 2022
IMPLEMENTED ON. JANUARY 01, 2024
Issued by. State Administration for Market Regulation;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 6
4 General requirements... 8
4.1 Safety requirements... 8
4.2 Radio disturbance characteristics... 8
4.3 Power supply harmonic current limit... 8
5 Technical requirements... 8
5.1 Appearance of lamps... 8
5.2 Marks... 8
5.3 Luminosity... 10
5.4 Color performance... 10
5.5 Modulation depth and temporal light artifact... 11
5.6 Power... 11
5.7 Power factor... 12
5.8 Electromagnetic radiation from table lamps to the human body... 12
5.9 Blue light hazards to the retina... 12
5.10 Noise... 12
6 Test methods... 12
6.1 General test conditions... 12
6.2 Appearance of lamps... 13
6.3 Marks... 13
6.4 Luminosity... 13
6.5 Chromaticity performance... 16
6.6 Modulation depth and temporal light artifact... 17
6.7 Power... 17
6.8 Power factor... 18
6.9 Electromagnetic radiation from table lamps to human body... 18
6.10 Blue light hazards to the retina... 18
6.11 Noise... 18
6.12 Test status description of dimmable/color-adjustable products... 19
6.13 Description of test status of table lamp with charging device... 19
Annex A (informative) Sector area illumination and illuminance uniformity test method
... 20
Annex B (normative) Calculation of chromaticity coordinate target values for flexible
correlated color temperature TF... 21
Bibliography... 24
Performance requirements for table lamps for paper task
1 Scope
This document specifies the performance requirements for table lamps for paper task
(hereinafter referred to as table lamps) that use tungsten filament lamps, fluorescent
lamps or LEDs as light sources and a power supply voltage not exceeding 250 V.
This document applies to table lamps used for reading and writing in homes, classrooms
and similar places, and table lamps that claim to have similar functions such as "eye
protection", "study", "work", etc., including table lamps with charging devices, table
lamps with USB ports as power connection methods, and clip-on table lamps.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB/T 6882, Acoustics -- Determination of sound power levels and sound energy
levels of noise sources using sound pressure -- Precision methods for anechoic rooms
and hemi-anechoic rooms
GB 7000.1-2015, Luminaires -- Part 1.General requirements and tests
GB 7000.204, Luminaires -- Part 2-4.Particular requirements -- Portable general-
purpose luminaires
GB/T 10682-2010, Double-capped fluorescent lamps -- Performance specifications
GB 17625.1, Electromagnetic compatibility -- Limits -- Part 1.Limits for harmonic
current emissions (equipment input current ≤16 A per phase)
GB/T 17743, Limits and methods of measurement of radio disturbance
characteristics of electrical lighting and similar equipment
GB/T 31275, Assessment of lighting equipment related to human exposure to
electromagnetic field
GB/T 31728, Portable luminaires with charging devices
GB/T 36979, Measuring method of spatial distribution of color characteristics for
LED products
surface, the placement direction, etc. The description of the clip-on table lamps includes the effective
work surface size and installation requirements applicable to the product, such as the minimum
clamping depth of the clamp (the minimum width of the tabletop edge protruding outside) and the
clamping thickness range.
3.6 modulation depth
Modulation
The ratio of the difference between the maximum and minimum values of the light
output in one cycle to the sum of the maximum and minimum values of the light output.
NOTE. The term "modulation depth" comes from IEEE Std 1789.The corresponding English term
in GB/T 2900.65 is amplitude of fluctuation. The definitions of the two terms are the same.
Modulation depth is expressed as a percentage.
3.7 temporal light artifact; TLA
The visual perception of human observers in a specific environment caused by light
stimuli whose brightness or spectral distribution fluctuates over time.
NOTE. Visual change perception is the result of comparing the visual perception of an environment
illuminated by modulated light with the visual perception of the same person when the same
environment is illuminated by non-modulated light.
[Source. CIE TN 006.2016, 2.4.1]
3.8 flicker
For static observers in a static environment, light stimuli whose brightness or spectral
distribution fluctuates over time induce visually unstable perceptions.
NOTE 1.The temporal changes of light stimulation include periodic and non-periodic ones, which
may be caused by the light source itself, the power supply or other influencing factors.
NOTE 2.Flicker is a type of transient light artifact.
[Source. CIE TN 006.2016, 2.4.2]
3.9 stroboscopic effect
For static observers in non-static environments, changes in the perception of motion
caused by light stimuli whose brightness or spectral distribution fluctuates over time.
NOTE. The stroboscopic effect is a type of temporal light artifact.
Example 1.When brightness changes in a periodic square wave, moving objects are
perceived as discrete rather than continuous motion.
a) For table lamps with replaceable light sources, the manufacturers and model
specifications of the light sources allowed to be used shall be as follows.
b) For table lamps with fluorescent lamps, the correlated color temperature shall be
as per Annex D of GB/T 10682-2010.
c) For LED table lamps, the product correlated color temperature or the adjustable
range of correlated color temperature. For LED table lamps with adjustable color
temperature, if the upper limit of the nominal correlated color temperature range
exceeds 4000 K, there shall be a reminder including the following content. It is
recommended to adjust the color temperature to below 4000 K when used at night.
For LED table lamps with non-adjustable color temperature and a nominal
correlated color temperature higher than 4000 K, there shall be a reminder
including the following content. This table lamp is not suitable for use at night.
d) General color rendering index Ra and (or) special color rendering index R9.
e) Rated input power and power factor.
f) The normal attitude of the table lamp, including.
- The relative position between the light-emitting surface of the table lamp and
the effective working area for lighting reading and writing tasks;
- The height of the light-emitting surface;
- The tilt angle of the light-emitting surface;
- The placement and direction of the table lamp and other information.
The clip-on table lamp shall state the effective work surface size and installation
requirements for the product, such as the minimum clamping depth of the clamp
(the minimum width protruding from the edge of the tabletop) and the clamping
thickness range.
g) Rated operating time of the table lamp with charging device.
NOTE 1.The instruction manual can be in paper form or in electronic form, such as a QR code
or other form.
h) Table lamps shall claim one or more of the following characteristics of modulation
depth and/or transient light artifacts.
- LED table lamp modulation depth level specified in 5.5.2;
- The threshold level at which stroboscopic effects and flicker may be observed is
5.7 Power factor
The measured value of power factor shall not be lower than the nominal value by 0.05
or more.
a) For table lamps with a power greater than 5 W and less than 25 W, the nominal
power factor shall not be less than 0.5;
b) For table lamps with a power greater than 25 W, the nominal power factor shall
not be less than 0.9.
NOTE. When the measured power is not less than 90% and not more than 110% of the rated input
power, the limit value is determined according to the rated input power. When the measured power
exceeds the above range, the limit value is determined according to the measured power.
5.8 Electromagnetic radiation from table lamps to the human body
It shall comply with the requirements of GB/T 31275.
5.9 Blue light hazards to the retina
According to GB/Z 39942-2021, the retinal blue light hazard category shall be RG0.
5.10 Noise
The noise level of a table lamp containing a lamp control device shall not be greater
than 25 dB(A) when operating normally.
6 Test methods
6.1 General test conditions
6.1.1 The test shall be carried out in a room without convection airflow, with relative
humidity not exceeding 65% and an ambient temperature of 25℃±1℃.
6.1.2 Unless otherwise specified, the test shall be carried out at rated voltage and rated
frequency. If the rated voltage is a range, it shall be measured at 220 V and 50 Hz.
6.1.3 The test power supply voltage and frequency error shall be kept within ±0.2% of
the nominal value.
6.1.4 The total harmonic content of the test power supply voltage shall not be greater
than 3%.
6.1.5 The accuracy of the electrical instruments used shall not be lower than Class 0.2.
The accuracy of the illumination measuring instrument shall not be lower than Class 1
requirement in JJG 245.
6.1.6 Before the lamp brightness test, it shall be aged according to the relevant light
source performance standards.
6.2 Appearance of lamps
The external dimensions of the lamps shall be inspected with a general measuring tool
with an accuracy of not less than 0.1 mm. The color and structure shall be inspected
visually.
6.3 Marks
The integrity of the marking content is checked visually. The firmness of the marking
is checked by the method specified in 3.4 of GB 7000.1-2015.
6.4 Luminosity
6.4.1 Light blocking and anti-glare
The working position of the table lamp during the shading and anti-glare tests shall be
consistent with that during the illuminance and illuminance uniformity tests.
Place the lamp on a level table in its normal attitude. Take measurements after the light
source has stabilized. First, place the lens center of the luminance meter at a height of
400 mm from the table, 600 mm from the geometric center of the light source cavity
surface, and perpendicular to the edge of the table. The position passes through the
geometric center of the light source cavity surface, as shown in Figures 1 and 2.Then
adjust the horizontal and vertical angles of the luminance meter during the test. Measure
the surface brightness of all light sources, translucent components, and reflective
components observed.
For table lamps with the light-emitting surface in the normal attitude higher than 750
mm relative to the tabletop, the part above this height is exempted.
GB/T 9473-2022
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.140.40
CCS K 72
Replacing GB/T 9473-2017
Performance requirements for table lamps for paper task
ISSUED ON. DECEMBER 30, 2022
IMPLEMENTED ON. JANUARY 01, 2024
Issued by. State Administration for Market Regulation;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 6
4 General requirements... 8
4.1 Safety requirements... 8
4.2 Radio disturbance characteristics... 8
4.3 Power supply harmonic current limit... 8
5 Technical requirements... 8
5.1 Appearance of lamps... 8
5.2 Marks... 8
5.3 Luminosity... 10
5.4 Color performance... 10
5.5 Modulation depth and temporal light artifact... 11
5.6 Power... 11
5.7 Power factor... 12
5.8 Electromagnetic radiation from table lamps to the human body... 12
5.9 Blue light hazards to the retina... 12
5.10 Noise... 12
6 Test methods... 12
6.1 General test conditions... 12
6.2 Appearance of lamps... 13
6.3 Marks... 13
6.4 Luminosity... 13
6.5 Chromaticity performance... 16
6.6 Modulation depth and temporal light artifact... 17
6.7 Power... 17
6.8 Power factor... 18
6.9 Electromagnetic radiation from table lamps to human body... 18
6.10 Blue light hazards to the retina... 18
6.11 Noise... 18
6.12 Test status description of dimmable/color-adjustable products... 19
6.13 Description of test status of table lamp with charging device... 19
Annex A (informative) Sector area illumination and illuminance uniformity test method
... 20
Annex B (normative) Calculation of chromaticity coordinate target values for flexible
correlated color temperature TF... 21
Bibliography... 24
Performance requirements for table lamps for paper task
1 Scope
This document specifies the performance requirements for table lamps for paper task
(hereinafter referred to as table lamps) that use tungsten filament lamps, fluorescent
lamps or LEDs as light sources and a power supply voltage not exceeding 250 V.
This document applies to table lamps used for reading and writing in homes, classrooms
and similar places, and table lamps that claim to have similar functions such as "eye
protection", "study", "work", etc., including table lamps with charging devices, table
lamps with USB ports as power connection methods, and clip-on table lamps.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB/T 6882, Acoustics -- Determination of sound power levels and sound energy
levels of noise s...