KENYA STANDARD      DKS 2914:2020 
 ICS  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
Minimum Energy Performance Standards 
and Functional Performance 
Requirements for General Service Lamps 
(GSLs)  
 
 
 
 
PUBLIC REVIEW DRAFT, APRIL 2020 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
©KEBS 2020         First  Edition 2020  
 
 
  DKS 2914:2020  
ii                     © KEBS 2020 — All rights reserved  
TECHNICAL COMMITTEE REPRESENTATION 
 
The following organizations were represented on the Technical Committee: 
 
Lighting Solutions Ltd 
Technical University of Mombasa 
Energy and Petroleum Regulatory Authority  
Kenyatta University 
Kenya National Chamber of Commerce and Industry 
State Department of Public Works. 
Schneider Electric Kenya Ltd. 
Ministry of Energy 
Strathmore University 
Intertek 
JKUAT 
Thames Electrical 
LEDMatix LTD 
K.P.L.C 
Multiplex Electricals 
Kenya Industrial Research and Development Institute 
Institution of Engineers of Kenya 
Kenya Bureau of Standards - Secretariat 
 
 
 
 
 
 
 
 
REVISION OF KENYA STANDARDS 
 
In order to keep abreast of progress in industry, Kenya Standards shall be regularly reviewed. Suggestions for 
improvements to published standards, addressed to the Managing Director, Kenya Bureau of Standards, are 
welcome. 
 
 
 
 
 
© Kenya Bureau of Standards, 2020 
  
Copyright. Users are reminded that by virtue of Section 25 of the Copyright Act, Cap. 12 of 2001  of the Laws of Kenya, copyright subsists 
in all Kenya Standards and except as provided under Section 26 of this Act, no Kenya Standard produced by Kenya Bureau of Standards 
may be reproduced, stored in a retrieval system in any form or transmitted by any means without prior permission in writing from the 
Managing Director. 
 
 
 
 
  KENYA STANDARD       DKS 2914: 2020 
                                                                                                             ICS  
 © KEBS 2019            iii  
 
 
 
 
 
 
 
 
 
 
 
Minimum Energy Performance Standards 
and Functional Performance 
Requirements for General Service Lamps 
(GSLs)  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
KENYA BUREAU OF STANDARDS (KEBS) 
 
Head Office:  P.O. Box 54974, Nairobi-00200, Tel.: (+254  020) 605490, 602350, Fax: (+254 020 )  604031 
E-Mail: info@kebs.org,  Web:http://www.kebs.org   
 
Coast Region    Lake Region         Rift Valley Region  
P.O. Box 99376, Mombasa-80100  P.O. Box 2949, Kisumu-40100       P.O. Box 2138, Nakuru-20100 
Tel.: (+254  041) 229563, 230939/40 Tel.: (+254 057) 23549, 22396       Tel.: (+254 051) 210553, 210555 
Fax: (+254  041) 229448   Fax: (+254 057) 21814  
 
 
 
 
 
 
 DKS 2914:2020  
iv                     © KEBS 2020 — All rights reserved  
 
  
 DKS 2914:2020  
iv  © KEBS 2020 Foreword 
 
This Kenya standard was prepared by the Electric Lamps and wiring accessories Technical 
Committee  and it is in accordance with the procedures of the Kenya Bureau of Standards. 
 
During the development of this Standard, reference was made to the following document; 
 
International Energy Agency 4E Solid State Lighting Annex Product Quality and Performance Tiers 
(http://ssl.iea-4e.org/) . 
 
 
 
 
Acknowledgement is hereby made for the assistance received from this source. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
KENYA STANDARD               DKS 2914:2020 
 
 
© KEBS 2020 — All rights reserved                     1  
Minimum Energy Performance Standards and Functional Performance 
Requirements for General Service Lamps (GSLs)  
 
 
1. Scope 
1.1. Inclusions 
 
This standard for General Service Lamps (GSLs) covers the minimum energy performance 
requirements and functional performance of general lighting, directional and non-directional lamps, 
of all shapes and finishes; using incandescent, halogen, fluorescent, high intensity discharge, light 
emitting diode (LED), and other light source technologies; and satisfy a) to d): 
a) Capable of operating on a voltage up to 300V of either direct current or alternating current 
with a frequency of 50Hz;  
b) Emitting light with a total luminous flux of 60 to 3300 lumens;  
c) Light emission with the chromaticity coordinates (x, y) that are within the range (shown in 
Figure 1): 
 0.250 < x < 0.570 and  
 - 2.3172 x2 + 2.3653 x - 0.2400 < y < - 2.3172 x2 + 2.3653 x - 0.1400;  
This includes fixed white light sources as well as tuneable sources that are tuneable 
to within the white region specified by the chromaticity coordinates (x and y) above.   
 
Figure 1: GSL Chromaticity Limits  
 
d) A lamp base which can be connected to one of the following sockets: E10, E11, E12, E14, E17, E26, 
E27, B15, B22, R7, G4, GX5.3/GU5.3, G6.35, GX53, GU9, G9, GU10 or GZ10 base, or alternative base 
type that can be connected to these sockets by using commercially available passive adaptors. 
1.2. Exclusions  
The following lamps are exempted from the requirements of this compulsory specification:  
a) the primary purpose of the lamp is not general illumination and the product packaging is 
prominently marked as such, for example but not limited to:  
 
                              © KEBS 2020— All rights reserved 2 I. emission of light as an agent in chemical or biological processes (other than 
human visual perception), for example but not limited to: 
 polymerization, 
 ultraviolet light used for curing/drying/hardening, 
 photodynamic therapy, 
 horticulture, 
 food service, 
 medical applications, 
 aquarium, 
 animal care, and 
 anti-insect products;  
II. image capture and image projection, for example but not limited to: 
 camera flashlights,  
 photocopiers, and 
 video projectors;  
III. signalling, for example but not limited to: 
 railway-signalling 
 marine-signalling, 
 road-signalling and traffic control, and 
 air traffic-signalling and airfield lamps; 
b) the spectral distribution of the light is adjusted to the specific needs of particular technical 
equipment, in addition to making the scene or object visible for humans, for example but 
not limited to:  
 studio lighting,  
 performance special effects lighting, and 
 theatre lighting;  
c) the scene or object lit requires special protection from the negative effects of the light 
source, for example but not limited to: 
 lighting with dedicated filtering for photosensitive patients, and 
 lighting with dedicated filtering for photosensitive museum exhibits; 
d) lighting is required only for emergency situations, for example but not limited to: 
 emergency lighting luminaires;  
e) requiring ambient temperatures above 120°C and this exemption only applies to 
incandescent and halogen lamps with the following characteristics: 
 an overall length of maximum 60 mm,  
 a rated power of maximum 25 W,  
 a base type of E14 or B15, and 
 a rated luminous flux of maximum 225 lm; and 
f) lamps for national measurement standards. 
g) lamps that fall outside of the scope of coverage defined in section 1.1 of this regulation. 
 
   
© KEBS 2020 — All rights reserved          32. Normative references 
 
The following documents are referenced in this standard. For dated references, only the edition cited 
applies. For undated references, the latest edition of the referenced document (including any 
amendments) applies. 
 
KS IEC 61000-3-2, Electromagnetic compatibility (EMC) - Part 3-2: Limits - Limits for harmonic 
current emissions (equipment input current ≤ 16 A per phase) 
 
KS IEC 61000-4-7, Electromagnetic compatibility (EMC) - Part 4-7: Testing and measurement 
techniques - General guide on harmonics and inter-harmonics measurements and instrumentation, 
for power supply systems and equipment connected thereto. 
 
KS IEC 60064, Tungsten filament lamps for domestic and similar general lighting purposes - 
Performance requirements. 
 
KS IEC 62321-1, Determination of certain substances in electrotechnical products - Part 1: 
Introduction and overview 
 
KS IEC 62321-3-1, Determination of certain substances in electrotechnical products - Part 3-1: 
Screening - Lead, mercury, cadmium, total chromium and total bromine using X-ray fluorescence 
spectrometry 
 
KS IEC 60969, Self-ballasted lamps for general lighting services - Performance requirements. 
 
KS IEC PAS 62612, Self-ballasted LED lamps for general lighting services with supply voltages > 
50 V - Performance requirements 
 
IEC 63103 Lighting equipment - Non-active mode power measurement 
 
IEC 62471, Photobiological safety of lamps and lamp systems  
 
IEC 61547, Equipment for general lighting purposes - EMC immunity requirements 
 
IEC TR 61547-1, Equipment for general lighting purposes - EMC immunity requirements - Part 1: An 
objective light flickermeter and voltage fluctuation immunity test method 
 
IEC TR 63158, Equipment for general lighting purposes - Objective test method for stroboscopic 
effects of lighting equipment 
 
IEC TR 62778, Application of IEC 62471 for the assessment of blue light hazard to light sources and 
luminaires 
 
CISPR 15:2018, Limits and methods of measurement of radio disturbance characteristics of 
electrical lighting and similar equipment 
 
CIE 84, Measurement of Luminous Flux 
 
CIE S015, Lighting of Outdoor Work Places 
 
CIE S025, Test Method for Led Lamps, Led Luminaires and Led Modules 
  
                              © KEBS 2020— All rights reserved 4 CIE 13.3, Method of Measuring and Specifying Colour Rendering Properties of Light Sources 
 
 
   
© KEBS 2020 — All rights reserved          53. Definitions 
 
3.1. For the purposes of this document, the definitions in the standards referred in section 6 of 
this standard shall apply . 
 
3.2.  In addition, the following definitions shall apply:  
3.2.1. arithmetical mean:  the average of a set of numerical values, calculated by adding 
them together and dividing by the number of terms in the set. 
3.2.2. beam angle of a directional lamp:  the angle between two imaginary lines in a plane 
through the optical beam axis, such that these lines pass through the centre of the front 
face of the light source and through points at which the luminous intensity is 50 % of the 
centre beam intensity, where the centre beam intensity is the value of luminous intensity 
measured on the optical beam axis.  Note 1. For lamps that have different beam angles 
in different planes, the largest beam angle shall be considered; Note 2. For lamps with 
user-controllable beam angle, the beam angle corresponding to the ‘reference control 
setting’ shall be considered. 
3.2.3. chromaticity:  the property of a colour stimulus defined by its chromaticity coordinates 
(x and y). 
3.2.4. colour rendering index (CRI):  the measure of the degree to which the 
psychophysical colour of an object illuminated by the test illuminant conforms to that of 
the same object illuminated by the reference illuminant, suitable allowance having been 
made for the state of chromatic adaptation. CRI is a measure of the ability of a light 
source to accurately reveal the colours of various objects in comparison with an 
incandescent source of the same colour temperature. 
3.2.5. colour-tuneable lamp (CTL):  a connected lamp (CL) using LED or OLED 
technology, that can be set to emit light with a large variation of colours outside the 
range defined in the scope, but can also be set to emit white light inside the colour range 
defined in the scope, and with which the lamp is in the scope of this standard. 
The term does not include tuneable-white lamps that can only be set to emit white light, 
with different colour temperatures, within the range defined in the scope. 
The term also does not include dim-to-warm lamps, that shift their white light output to 
lower colour temperature when dimmed, simulating the behaviour of incandescent light 
sources. 
3.2.6. connected lamp (CL):  a general service lamp including data-connection parts that 
are physically integrated with the light emitting parts in a single inseparable housing, 
and where the data-connection parts cannot be disconnected, switched-off or their 
power consumption minimised. 
3.2.7. correlated colour temperature (CCT):  the temperature of the Planckian radiator 
whose perceived colour most closely resembles that of a given stimulus at the same 
brightness and under specified viewing conditions. Units: K. Lamps with a high CCT, 
e.g. 6500K, produce blueish-white light, whereas those with a low CCT of 2700K 
produce light that is more yellowish-white. 
3.2.8. data-connection parts:  parts that perform one of the following functions: 
–  reception or transmission of wired or wireless data signals and the processing thereof 
(either used to control the light emission function or otherwise), 
–  sensing and processing of the sensed signals (either used to control the light 
emission function or otherwise), 
–  actuation by audio control (including voice control), 
–  a combination of these.  
                              © KEBS 2020— All rights reserved 6 3.2.9. directional lamp (DL):  a lamp which has a beam angle (as defined in IEC 
61341:1994 and measured in accordance with CIE S025:2015) of no more than 90 
degrees in at least one plane and that being in at least one plane for an asymmetric 
beam lamp. These lamps are also known as reflector lamps and are commonly installed 
in recessed cans or track lighting. 
3.2.10. endurance test:  (also called a supply switching test) is the switching on and off of a 
solid state lighting product to simulate how a product will perform over its lifetime. The 
test is carried out to stress a solid state lighting product over a period of time to help 
determine the failure rates and luminous flux maintenance of a product. 
3.2.11. flicker: the perception of visual unsteadiness induced by a light stimulus, the 
luminance or spectral distribution of which fluctuates with time, for a static observer in 
a static environment. The fluctuations can be periodic and non-periodic and may be 
induced by the light source itself, the power source or other influencing factors. 
3.2.12. fluorescence or fluorescent light source (FL):  the phenomenon or a light source 
using an electric gas discharge of the low-pressure mercury type in which most of the 
light is emitted by one or more layers of phosphors excited by the ultraviolet radiation 
from the discharge. Fluorescent light sources may have one ('single-capped') or two 
('double-capped') connections (‘caps’) to their electricity supply. For the purposes of this 
standard, magnetic induction light sources are also considered as fluorescent light 
sources. 
3.2.13. fundamental power factor  (also called displacement power factor, or Cos 1) 
quantifies the displacement (phase-shift) between the fundamental current and voltage 
waveforms by calculating the cosine of the phase-shift angle. Fundamental power factor 
is a more detailed measure to quantify the displacement of the current and its effect on 
the power supply network  
3.2.14. gas discharge:  a phenomenon where light is produced, directly or indirectly, by an 
electric discharge through a gas, plasma, metal vapour or mixture of gases and vapours. 
3.2.15. general illumination purposes:  for the purposes of this standard, means any light 
source that meets the requirements of section 1.1 and is not exempted under section 
1.2.  
3.2.16. general service lamp (GSL):  includes general service incandescent and halogen 
lamps (GSILs), compact fluorescent lamps (CFLs), general service light-emitting diode 
(LED) lamps, organic light-emitting diode (OLED) lamps, and any other lamps that are 
used to satisfy lighting applications traditionally served by GSILs. GSLs are used in 
general lighting applications and can be operated directly on the mains electricity 
supply. GSLs account for the majority of installed lighting in the residential sector. 
3.2.17. halogen lamp:  gas-filled lamp containing halogens or halogen compounds, the 
filament being of tungsten. 
3.2.18. illumination:  the application of light to a scene, objects or their surroundings so that 
they may be seen. 
3.2.19. incandescence:  emission of optical radiation by the process of thermal radiation. In 
light sources incandescence is typically produced by the passage of an electric current 
through a threadlike resistive conductor (‘filament’) which creates heat. 
3.2.20. lamp: a light source made in order to produce an optical radiation, usually visible. 
Note: The term "lamps" is often referred to as a bulb or light bulb. 
3.2.21. lamp cap:  that part of a lamp which provides connection to the electrical supply by 
means of a lampholder or lamp connector and, in most cases, also serves to retain the 
lamp in the lampholder.  
Note 1. The term base is also used in both the United Kingdom and the US to denote 
an integral part of a lamp envelope which has been so shaped that it fulfils the function  
© KEBS 2020 — All rights reserved          7of a cap. It may engage either a holder or a connector, depending on other design 
features of the lamp- and holder system.  
Note 2. The cap of a lamp and its corresponding holder are generally identified by one 
or more letters followed by a number which indicates approximately the principal 
dimension (generally the diameter) of the cap in millimetres. 
3.2.22. life (of a lamp): the total time for which a lamp has been operated before it becomes 
useless or is considered to be so according to specified criteria. Note: Lamp life is 
usually expressed in hours.  
3.2.23. light emitting diode (LED):  a technology in which light is produced from a solid state 
device embodying a p-n junction of inorganic material or organic material. This latter 
case is also known as ‘organic light emitting diode’ (OLED). In both cases the junction 
emits optical radiation when excited by an electric current. 
3.2.24. lumen (lm):  an SI unit of luminous flux which is emitted in unit solid angle (steradian) 
by a uniform point source having a luminous intensity of 1 candela. It indicates the 
amount of light the lamp provides.  
3.2.25. luminaire:  an apparatus which distributes, filters or transforms the light transmitted 
from one or more lamps and which includes, except the lamps themselves, all the parts 
necessary for fixing and protecting the lamps and, where necessary, circuit auxiliaries 
together with the means for connecting them to the electric supply. 
3.2.26. luminous efficacy (ηv or Φv):  expressed in lm/W, quotient of the luminous flux 
emitted by the electric power consumed by the light source.  It is an expression of how 
energy efficient a lamp (or bulb) is at producing visible light. 
3.2.27. luminous flux or flux (Φ):  expressed in lumen (lm), means the quantity derived from 
radiant flux (radiant power) by evaluating the electromagnetic radiation in accordance 
with the spectral sensitivity of the human eye. If not specified differently, it refers to the 
rated, maximum initial luminous flux of a light source, after a short operating period, and 
to the total flux emitted in a solid angle of 4π steradians (corresponding to a 360˚ 
sphere). 
3.2.28. non-directional lamp (NDL):  a general service lamp that is not a directional lamp. 
3.2.29. rated life, L 70B50 ‘lifetime’ for LED and OLED light sources means the time in hours 
between the start of their use and the moment when for 50% of a population of light 
sources the light output has gradually degraded to a value below 70% of the initial 
luminous flux. This is also referred to as the L70B50 lifetime;  
3.2.30. rated luminous flux (of a model of lamp): the value of the initial luminous flux of a 
given model of lamp declared by the manufacturer or the responsible vendor, the lamp 
being operated under specified conditions. Unit: lm. Note 1: The initial luminous flux 
may be the luminous flux of a lamp after a short ageing period, as specified in the 
relevant lamp standard. Note 2: The rated luminous flux is sometimes marked on the 
lamp. (IEC) 
3.2.31. rated power  (of a model of lamp): the value of the consumed electrical power by a 
given model of lamp declared by the manufacturer or the responsible vendor, the lamp 
being operated under specified conditions. Unit: W. Note: The rated power is usually 
marked on the lamp. (IEC) 
3.2.32. rated voltage  or rated voltage range : the nominal voltage/range of voltage at which 
a piece of electrical equipment is designed to operate. 
3.2.33. reference control setting : a control setting or combination of control settings that is 
used to verify compliance of a light source with this standard. These settings are 
relevant for light sources that allow the end-user to control, manually or automatically, 
directly or remotely, the luminous intensity, colour, colour temperature, spectrum, and/or 
beam angle of the emitted light.  
                              © KEBS 2020— All rights reserved 8 The reference control settings shall be those predefined by the manufacturer as factory 
default values and encountered by the user at first installation (out-of-the-box values). 
If the installation procedure foresees an automatic software update during first 
installation, or if the user has the option to perform such an update, the resulting change 
in settings (if any) shall be taken into account.  
The light source manufacturer shall define the reference control settings such that: 
 The light source is in scope of this standard according to 1.1 and none of the 
conditions for exemption of 1.2 applies (if this is not possible, the light source is out-
of-scope or exempted); 
 The adjustable/selectable beam angle is the narrowest available; 
 The power consumption of lighting control parts and non-lighting parts is minimal (if 
these parts cannot be disconnected or switched-off); 
 The full-load condition is obtained (maximum initial luminous flux given the other 
chosen settings); 
 When the end-user opts to reset factory defaults, the reference control settings are 
obtained. 
3.2.34. stroboscopic effect visibility measure (SVM): stroboscopic effect evaluated over 
a specified time interval of a relatively short duration. The duration is at least 1 second, 
in accordance with CIE TN 006 and IEC TR 63158 . 
3.2.35. short term flicker indicator ( PstLM): a measure of flicker evaluated over a duration 
of at least 180 seconds in accordance with IEC 61547-1.  
3.2.36. stroboscopic effect : a change in motion perception induced by a light stimulus the 
luminance or spectral distribution of which fluctuates with time, for a static observer in 
a non-static environment.  
  
   
© KEBS 2020 — All rights reserved          94. Requirements 
 
4.1. Efficiency requirements 
 
GSLs shall comply with the luminous efficacy requirements in Table 1. 
Table 1: Minimum luminous efficacy  
Product Type Minimum luminous efficacy (lm/W) 
Non-directional lamp 90 
 
 
Depending on the lamp characteristics, the minimum luminous efficacy values may be 
decreased by the following correction factors (C): 
Table 2: Correction factors  
Lamp Characteristics C 
Directional lamps -15% 
Compact Fluorescent Lamp (CFL) -20% 
Colour-tuneable lamps (CTL) -10% 
Connected LED Lamps – rated luminous flux Φ (lm):  
60 lm ≤ Φ ≤ 300 lm -15% 
300 lm < Φ ≤ 650 lm -10% 
650 lm < Φ ≤ 1200 lm -7.5% 
1200 lm < Φ ≤ 2000 lm -5.0% 
2000 lm < Φ ≤ 3300 lm -2.5% 
 
 
With respect the correction factors in Table , the following should be noted: 
 
 Where applicable, the correction factors are additive up to a maximum of 25%. See 
ANNEX C. 
 For colour-tuneable lamps (defined in Section 2) that are also connected lamps, the 
correction factors are additive. 
 Lamps that allow the end-user to adapt the spectrum and/or the beam angle of the 
emitted light, thus changing the values for useful luminous flux, CRI-Ra and/or colour 
temperature (Tc), and/or changing their directional lamp or non-directional lamp status, 
shall be evaluated using the reference control settings. 
4.2. Fundamental Power Factor 
 
All GSLs shall have a fundamental power factor as stipulated in Table 3: 
 
 
 
Table 3: Fundamental power factor   
                              © KEBS 2020— All rights reserved 10Rated Input Power for the lamp  
P in W Fundamental  
Power Factor  
P ≤ 2W Not applicable 
P > 2W ≥ 0.9 
 
 
4.3. Standby Power for connected lamps 
 
Standby power for connected lamps shall not exceed 0.5 W.  
Networked standby power for Connected LED Lamps shall not exceed 0.5 W. 
4.4. Functional Performance Requirements 
 
All GSL shall comply with the functional requirements in Table 4: 
 
Table 4: Functional requirements  
Metric Mandatory Requirements   
Colour Rendering Index (CRI) Ra  80  
Lumen maintenance factor (for 
CFL) At 5000h, >80% of initial lumen output 
Lifetime (for CFL) ≥ 6000h 
Lumen maintenance factor (for 
non-CFL) The lumen maintenance factor X LMF% after endurance 
testing according to Annex B shall be not less than 
XLMF,MIN%, calculated as follows:  
 
 
where L 70 is the declared L 70B50 lifetime (in hours)  
Upper limit for X LMF,MIN%: the calculated required lumen 
maintenance of the sample shall not exceed 96.0%  (i.e., 
XLMF,MIN ≤ 96.0 %).  
Survival factor (for non-CFL) No less than 90% of sample units should be operational 
following endurance testing according to Annex B.  
EMC emissions Compliance with IEC 61000-3-2 
EMC immunity  Compliance with IEC 61547  
Total Harmonic Distortion Compliance with IEC 61000-4-7 
Harmonic 
Order 
n Maximum permissible harmonic current 
expressed as a percentage of the input 
current at the fundamental frequency 
(%) 
2 2 
3 30 – CPF* 
 
© KEBS 2020 — All rights reserved          11Metric Mandatory Requirements   
5 10 
7 7 
9 5 
11≤ n ≤ 39 3 
*CPF is the circuit power factor  
 
Short term flicker indicator 
(PstLM) 
(for non-CFL) ≤ 1.0 at full load and a sinusoidal input voltage. 
Note: compliance with IEC 61547-1 
Stroboscopic effect visibility 
measure (SVM) ≤ 0.4 at full load and a sinusoidal input voltage. 
Note: compliance with IEC TR 63158 
Photobiological risk group  
(blue light and UV hazard) For the blue light hazard: RG0 or RG1 are allowed.  
If an LED uses a UV-based LED chip, then it must meet 
UV RG0 and RG1. The risk group (RG) is assessed at 200 
mm from the lamp using the general methodology of IEC 
62471 and the particular prescriptions of IEC TR 62778. 
Colour consistency  Variation of chromaticity coordinates within a five-step 
MacAdam ellipse or less.  
 
 
4.5. Hazardous Substances Requirement  
 
GSLs shall not contain any amount of Mercury greater than shown in Table 5.  
 
Table 5: Mercury content 
Product Type Mercury per lamp (mg) 
All GSL under this compulsory specification Comply with KS IEC 62321-1 and KS 
IEC 62321 -3-1 
 
 
4.6. Marking Requirements 
 
4.6.1. Lamp information  
The following information shall be clearly and indelibly printed on the product: 
1) Rated power in Watts  
2) Rated operating voltage 
3) Rated operating current 
4) Trade name or brand name 
5) Rated initial luminous flux in lumens 
6) Rated correlated colour temperature (CCT) in Kelvin (K)  
                              © KEBS 2020— All rights reserved 127) Beam angle (only for directional lamps) 
 
4.6.2. Packaging information  
The following information shall be clearly and prominently indicated on the packaging and 
in all other forms of product information: 
1) Rated power in Watts 
2) Rated operating voltage  
3) Rated frequency in Hz. 
4) Rated initial luminous flux in lumens 
5) Rated efficacy in lumens per Watt (lm/W) 
6) Rated lifetime in hours and L 70B50 if longer 
7) Rated correlated colour temperature (CCT) in Kelvin (K): 
Scale is optional.  
  
8) Mercury content in mg, if the product contains mercury and disposal methods of the 
lamp 
9) Statement on Dimmability. Clearly state whether dimmable or not dimmable. If yes, then 
information on dimmer compatibility, or web link to this information.  
10) Base type 
11) Power factor  
 
Note: Additional markings are allowed provided they do not give rise to misunderstanding.  
 
  
 
© KEBS 2020 — All rights reserved          13 
5. Referenced Test Standards and Compliance Certification 
 
5.1. The metrics, referenced standards and compliance certification criteria are set out in this 
section, with consideration of:  
 The latest edition of the referenced standards (including any amendments) applies. 
 The same sample of lamps may be used for certain metrics as set out in the test 
sequence in Annex A. 
 The required levels, sample sizes and compliance criteria for compliance certification by 
suppliers shall be the same as requirements in the referenced standards. Where the 
sample size is not specified, 10 units shall be the sample size. 
Table 6: Relevant test standards and compliance certification  
Phenomena Lamp Type Standard Compliance Certification 
(for suppliers)  
Luminous 
Efficacy 
[lm/W] All Calculated See 
below for 
(measured 
luminous flux / 
measured power) The arithmetical mean of the 
calculated luminous efficacy of 
the 10 units shall not be less 
than required level. 
Luminous 
flux in [lm] Incandescent 
/ Halogen IEC 60064 
CIE 84 The arithmetical mean of the 
measured luminous flux of the 
10 units shall not be less than 
92.5% of the rated luminous flux 
and the measured luminous flux 
of each individual lamp of the 
sample shall not be less than 
90% of the rated luminous flux CFL IEC 60969 
CIE 84 
LED IEC  62612 
CIE S025 
Power in [W] Incandescent 
/ Halogen IEC 60064 
CIE 84 The arithmetical mean of the 
measured power of the 10 units 
shall not exceed 107.5% of the 
rated power, and the measured 
power of each individual lamp of 
the sample shall not exceed 
110% of the rated power. CFL IEC 60969 
CIE 84 
LED IEC 62612 
CIE S025 
Standby 
Power Connected 
LED lamp IEC 63103 The measured standby power of 
each individual lamp of the 10 
units shall not exceed the 
required level by more than 100 
mW. 
Fundamental 
Power 
Factor LED IEC 62612 
IEC 61000-3-2 The measured displacement 
factor of each individual lamp of 
the sample shall not be less than 
the required level minus 0.05.  CFL IEC 60969 
Colour 
Rendering  
Index (CRI) LED IEC 62612 
CIE S 025 
CIE 13.3 The measured CRI of each 
individual lamp of the sample 
shall not be less than the 
required CRI -Ra level minus 3  
Correlated 
colour 
temperature LED IEC 62612 
CIE S025 
CIE S015 For each individual lamp of the 
sample, the measured CCT shall 
conform to the industry standard  
                              © KEBS 2020— All rights reserved 14Phenomena Lamp Type Standard Compliance Certification 
(for suppliers)  
(CCT) 
CFL IEC 60969 
CIE 84 
CIE S015 tolerances contained in the IEC 
standards used for testing. 
Luminous 
flux 
maintenance 
factor  CFL IEC 60969  
Annex A For each individual lamp of the 
sample, the measured luminous 
flux maintenance factor shall 
conform to the industry standard 
tolerances contained in the 
standards used for testing.  
LED See Annex B The determined XLMF% of the 
sample following the test in 
Annex B shall not be less than 
XLMF, MIN%. 
Survival 
Factor LED See Annex B At least 90% of the light units of 
the test sample must be 
operational after completing the 
endurance test in Annex B. 
Short-term 
Flicker 
indicator 
(PstLM) LED IEC TR 61547-1 For each individual lamp of the 
sample, the measured P stLM of 
the units shall not be more than 
the required level plus 5%. 
Stroboscopic 
effect 
Visibility 
Measure 
(SVM) LED IEC TR 63158 For each individual lamp of the 
sample, the measured SVM of 
the units shall not be more than 
the required level plus 5%. 
Lifetime CFL IEC 60969 Annex 
G  Life of the median lamp (or 6th of 
sample size of 10) shall be ≥ 
value specified 
EMC 
emissions All CISPR15:2009  
EMC 
immunity 
(including 
voltage 
surge and 
dip) All IEC 61547  
 
Total 
Harmonic 
Distortion  All IEC 61000-4-7  
 
 
6. Equivalence Of Standards 
 
6.1. Standards issued by different standardization bodies such as ISO and EN, will only be 
accepted if it is proven, in the form of a declaration report from an accredited conformity 
assessment body, that they are technically equivalent to the relevant Kenyan Standard or 
the informative annex. The applicant shall be responsible for obtaining such a declaration 
report.   
© KEBS 2020 — All rights reserved          15 
ANNEX A – TEST SEQUENCE 
 
 
 
 
 
 
      
 
                              © KEBS 2020— All rights reserved 16ANNEX B – ENDURANCE TEST SEQUENCE 
Light sources shall undergo endurance testing to verify their luminous flux maintenance factor and 
survival factor. This endurance testing consists of the test method outlined below. The endurance 
test for LED and OLED light sources shall be conducted as follows: 
 
B.1 AMBIENT CONDITIONS AND TEST SETUP: 
B.1.1 The switching cycles are to be conducted in a room with an ambient temperature of 25 
±10 °C and an average air velocity of less than 0.2 m/s; 
B.1.2 The switching cycles on the sample shall be conducted in free air in a vertical base-up 
position. However, if a supplier has declared the light source is suitable for use in a specific 
orientation only, then the sample shall be mounted in that orientation; 
B.1.3 The applied voltage during the switching cycles shall have a tolerance within 2 %. The total 
harmonic content of the supply voltage shall not exceed 3 %. Standards provide guidance on the 
supply voltage source. 
 
B.2 ENDURANCE TEST METHOD. 
B.2.1 Initial flux measurement: measure the luminous flux of the light source prior to starting the 
endurance test switching cycle; 
B.2.2 Switching cycles: operate the light source for 1200 cycles of repeated, continuous switching 
cycles without interruption. One complete switching cycle consists of 150 minutes of the light source 
switched ON at full power followed by 30 minutes of the light source switched OFF. The hours of 
operation recorded (i.e., 3000 hours) include only the periods of the switching cycle when the light 
source was switched ON, i.e. the total test time is 3600 hours; 
B.2.3 Final flux measurement: at the end of the 1200 switching cycles, note if any lamps have failed 
(see ‘Survival Factor’ requirements in Annex IV Table 6) and measure the luminous flux of the light 
sources that have not failed; 
B.2.4 For each of the units in the sample which have not failed, divide the measured final flux by 
the measured initial flux. Average the resulting values over all the units that did not fail to compute 
the determined value for the luminous flux maintenance factor X LMF%. 
 
   
© KEBS 2020 — All rights reserved          17ANNEX C – CALCULATION OF LUMINOUS EFFICACY CORRECTION 
FACTORS 
 
The additive correction factors shall be calculated as follows: 
 
1. Take the base value BV n and apply the first correction factor CF 1 to it, this becomes the new 
base value BV n+1. 
2. To apply another correction factor to this, apply the second correction factor CF 2 to the new 
base value. 
 
Example 
What is the minimum luminous efficacy acceptable for a Directional, Compact Fluorescent Lamp? 
 
Take the base value (Non-directional lamp) BV n 90 lm/W 
The correction factors applicable are: 
a) Directional lamps -15% CF 1 
b) Compact Fluorescent Lamp (CFL) -20% CF 2 
To calculate the new minimum luminous efficacy 
 
We take  
BVn+1 = BV n x (1+ CF 1) 
  90lm/W *(1-15%) = 76.5lm/W 
Now take  
BVn+2 = BVn+1 x (1+ CF 2) 
  76.5lm/W *(1-20%) = 61.2lm/W 
 
The calculated minimum luminous efficacy acceptable for a Directional, Compact Fluorescent 
Lamp is 61.2lm/W 
 
The additive value more than -25% of Minimum luminous efficacy Non-directional lamp.  
 
BVmin = BV n + (1+CF Max) 
  90 lm/W * (1-25%) = 67.5 lm/W 
 
 
 
   
                              © KEBS 2020— All rights reserved 18ANNEX D – ENERGY LABEL CLASSES 
The energy efficiency class of light sources shall be determined on the basis of the efficacy values 
expressed in total mains efficacy η TM, which is defined as the total initial luminous flux (in lm) 
divided by mains power input (in W) – (lm/W) – as set out in Table 7. 
 
Table 7: Energy efficiency classes  
Energy Efficiency Class Total mains efficacy ηTM (lm /W) 
A (most efficient) 210 ≤ η TM 
B 185 ≤ η TM < 210 
C 160 ≤ η TM < 185 
D 135 ≤ η TM < 160 
E 110 ≤ η TM < 135 
F 85 ≤ η TM < 110 
G (least efficient) η TM < 85 
 
The total mains efficacy η TM is calculated by dividing the luminous flux (expressed in lm) by the 
declared on-mode power consumption Pon (expressed in W) and multiplying by the applicable 
factor F TM of Table 8, i.e.: 
𝜂்ெ= ൬𝑙𝑢𝑚𝑒𝑛𝑠
𝑃௢௡൰ × 𝐹்ெ 
 
Table 8:  Factors FTM to be used for determination of η TM 
Light source type Factor F TM 
Non-directional mains light source (NDLS, MLS) 1.000 
Non-directional non-mains light source (NDLS, NMLS) 0.926 
Directional mains light source (DLS, MLS) 1.176 
Directional non-mains light source (DLS, NMLS) 1.089